Review Article | | Peer-Reviewed

The Chemistry of Some Internal Human Organs and Its Biological Fluids

Received: 17 June 2026     Accepted: 20 July 2026     Published: 18 August 2026
Views:       Downloads:
Abstract

PH is a scale from 0-14 used to determine if substances or mediums are acidic, alkaline or neutral. Blood is a buffer solution with a PH of 7.4, and it resists change in PH as it contains week conjugate acid and base pair; carbonate HCO3- and carbonic acid H2CO3. Mediums and solutions can be either acidic, alkaline or neutral; acidic if their measured PH is less than 7, neutral if their measured PH is 7, and alkaline if their measured PH is greater than 7. An organ can be made of different types of tissues that combine to form an organ. An organ system or a biological system is when two or more organs work together in execution of a body function. Reproductive organs in men or women are organs involved in the producing of children and involved in sexual function. The series of hollow organs joined in a long tube from mouth to anus is the GI tract. Biological fluids are Liquids within living organisms; each has a distinct physiological role. These fluids can be either extracellular or intracellular. The objective is to determine and list the PH of some internal human organs and their biological fluids based on their acidity or alkalinity. The PH of some internal human organs is listed in Table 1 and the PH of some biological fluids are listed in Table 2.

Published in American Journal of BioScience (Volume 14, Issue 4)
DOI 10.11648/j.ajbio.20261404.11
Page(s) 89-95
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2026. Published by Science Publishing Group

Keywords

Chemistry, PH gradient, Internal Organs’ PH

1. Introduction
Substances and mediums can be either acidic, alkaline or neutral. Mediums and solutions are acidic if their measured PH is less than 7, neutral if their measured PH is 7, and alkaline if their measured PH is greater than 7. Citric acid (vitamin C), sulfuric acid (battery acid), acetic acid (vinegar), and hydrochloric acid (digestive fluid in the stomach) are acids. Magnesium hydroxide used in antacid and in laxatives, ammonia used in household cleaners, and sodium hydroxide as in drain cleaners are all bases. A solution that would resist change in PH is a buffer solution as it contains week conjugate acid and base pair. Blood is a buffer solution with a PH of 7.4, and it contains carbonate HCO3- and carbonic acid H2CO3. In the body the PH varies from one part to another. The stomach has a PH of 1.35-3.5, the highest acidity area in the body as it aids in digestion and protects against microbial organisms. The layer outside the epithelium in the stomach is basic to prevent mucosal injury .
Figure 1. Some of the Human Internal Organs .
The two main organs that regulate blood PH are the kidney and the lungs. Blood PH is regulated slowly (days or hours) by the kidney by excreting acids in the urine and producing bicarbonates, increasing blood PH. Lungs rapidly regulate blood PH through exhaling carbon dioxide preventing the blood from being too acidic .
An Organ are tissues joint together in a structural unit to serve a function. Same type of cell form tissues that have a function. An organ can be made of different types of tissues that combine to form an organ. An organ system or a biological system is when two or more organs work together in execution of a body function. Organ tissues are classified into functional tissues called parenchyma, and tissues with supportive and connective functions called stroma. There are almost 79 organs in the human body. Figure 1, shows some human body organs; bone, lung, heart, intestine, brain, liver, kidneys, lung, stomach, pancreas, and urinary bladder…etc .
Reproductive organs are organs involved in the producing of children and involved in sexual function. The female reproductive system includes ovaries, uterus, cervix, fallopian tubes, and vagina as shown in Figure 2. The uterus contains an inner and outer lining; the inner lining is the endometrium, and the outer layer is the myometrium .
Figure 2. Anatomy of the Female Reproductive System. .
A group of organs the make up the reproductive system in a male is the male reproductive system is shown in Figure 3. It consists of scrotum, penis and testicles. The scrotum is a pouch skin that hangs behind the penis. The male organ for sextual intercourse is the penis. Testes, the testicles, lie in the scrotum and it’s an oval shaped organ. The prostate gland is divided into two lobes and is the size of a walnut. As you get older it becomes bigger. It’s below the bladder. The urethra surrounds the first part of the tube. The urethra carries semen, a sperm contained fluid, and it also carries urine from bladder to penis .
The digestive system consists of the GI tract, pancreas, liver and gallbladder is shown in Figure 4. The series of hollow organs joined in a long tube from mouth to anus is the GI tract. The GI tract is made of esophagus, mouth, small intestine, stomach, large intestine, and anus. The solid organs of the digestive system are pancreas, liver and gallbladder .
Figure 3. Anatomy of the Male Reproductive System. .
Figure 4. The Digestive System. .
Liquids within living organisms are called biological fluids. Biological fluids each have a distinct physiological role. These fluids can be either extracellular or intracellular. Examples of biological fluids are; saliva, blood, cerebrospinal fluid, semen, urine, lymph, and gastric juice. These biological fluids carry hormones, nutrients, waste products…etc. throughout the body to support bodily function and maintain homeostats. Blood contains red and white blood cells, platelets and plasma. Blood transports nutrients, oxygen, and hormones to the cells, provision of immune defense and removal of waste. Lymph plays a role in immune function, the transportation of dietary fats and it contains proteins, fats and lymphocytes. Cerebrospinal fluids cushion the spinal cord and brain, remove waste products, supplies nutrients to the central nervous system, and it’s a colorless liquid. Saliva contains electrolytes, water, some enzymes, and mucus. It facilitates swallowing, maintains oral hygiene, and aids in digestion. Urine contains metabolic waste products, water, urea, and some electrolytes. It regulates water and electrolyte balance and eliminates waste from the body. Gastric juice consists of mucus, intrinsic factor and hydrochloric acid, all contributes to the elimination of pathogens and contributes to digestion. Bile, a yellow- green fluid stored in the gallbladder and produced by the liver, facilitates the absorption of fat-soluble vitamins and digestion by emulsifying fat. It contains electrolytes, bile salts, cholesterol, and bilirubin. Semen consists of seminal fluid made of proteins, fructose and enzymes, and sperm cells. It transports sperms to the female reproductive system. Vaginal fluids are made up of microflora, water, mucus and cells. It offers protection against infections, maintains the PH of the vagina, and provides lubrication. Synovial fluid contains water, lubricin, proteins, and hyaluronic acid. It nourishes and lubricates the cartilage in joints and reduces frictions. Amniotic fluid cushiness and protects the fetus during pregnancy. It consists of water, fetal cells, electrolytes, and proteins .
The prostate gland and the seminal vesicle produce a white fluid which mixes with the sperm in the testicles forming semen. Semen contains 1-5% sperm, 65-75% fluid from the seminal vesicles, and 25-30% fluid from the prostate. Semen protects and nourishes the sperm. Semen transports the sperms out of the body into the female reproductive system to start the fetal development process by fertilizing an egg. Sperms are stored in a tube in the back of the testicles until it matures. After orgasm semen comes out of the penis. The sperm then combines with the prostate fluid and seminal vesicle fluids forming semen. Semen contains water, plasma, mucus, and a small amount of calcium, zinc, potassium, magnesium, fructose, citrate, lactic acid and glucose. These nutrients give sperms the energy to swim and nourish the sperm .
Cerebrospinal fluids, CSF, supports, protects, surrounds and cushiness the spinal cord and the brain. It’s a clear liquid made of pure plasma. It helps remove waste, helps the brain float, keep the brain’s temperature and pressure steady, carry antibodies and immune cells supporting the immune system and it delivers nutrients. There is almost 150 ml or 5 ounces in an adult’s body. Figure 5 shows the cerebrospinal fluid and brain .
Figure 5. Brain and the Cerebrospinal Fluid .
2. Experimental
The PH of some internal human organs are listed in Table 1. The PH of the small intestine, brain, intrafollicular pH (PH of storage area of thyroid hormone), and bone is mildly alkaline. Their PH’s range from 7.1 to 8.3. The PH of rectum, gallbladder bile, intracellular pH- thyroid follicular cells, and uterine cavity are mildly acidic to mildly alkaline. Their PH’s range from 6.6 to 7.8. The PH of large intestine (colon) is mildly acidic with PH of 5.5 to 7. The PH of the stomach is strongly acid with a PH of 1.5 to 3.5. The liver and heart have a neutral to mildly alkaline PH. Their PH’s range from 7 to 7.4. The upper vagina has a moderately acidic PH. Its PH is 5.7. The PH of the lower vagina is weakly acidic. Its PH is 3.8 to 4.5. Skin has a weakly acidic to mildly acidic PH. Its PH ranges from 4 to 6.5. Skin acts as a protective barrier from microbial overgrowth. The skin layers have a PH gradient as the PH of the outer layer is 4, and the basal layer has a PH of 6.9.
Figure 6. PH of the gastrointestinal tract; oral cavity, stomach cavity, duodenum, small intestine, and colon. .
Table 1. PH of Some Internal Human Organs and Fluids3,5,6, .

Organ Type

PH

Acidic / Basic / Neutral

Bone 33

7.4

Mildly Alkaline

Skin 5

4-6.5

Weakly Acidic to Mildly Acidic

Stomach 40,41

1.5-3.5

Strongly Acidic

Large intestine (Colon) 35, 39,40

7.9-8.5

Mildly Alkaline

Small intestine 3,39,40

7.2-7.5

Mildly Alkaline

Rectum 3,39,40

6.6-7.5

Mildly Acidic to Mildly Alkaline.

Bladder-Gallbladder bile 33

6.8 to 7.65

Mildly Acidic to Mildly Alkaline.

Liver 33

7-7.2

Neutral to Mildly Alkaline.

Heart 33

7-7.4

Neutral to Mildly Alkaline.

Brain 33

7.1-7.2

Mildly Alkaline

Pancreas and Pancreatic Secretion 33

7.5-8

Mildly Alkaline

Thyroid Gland

Intrafollicular pH-PH of storage area of thyroid hormone 36

7.6

Mildly Alkaline

Intracellular pH- Thyroid follicular cells 36

6.94-7.01

Mildly Acidic to Mildly Alkaline.

Male Reproductive System

Seminal vesicle gland fluid 32,38

7.2-8.5

Mildly Alkaline

Prostate fluid 32, 38

6.6-7.3

Mildly Acidic to Mildly Alkaline

Sperm 32,38

6.5 to 6.9

Mildly Acidic

Liquified semen fluid 32,38

7.2-8

Mildly Alkaline.

Female Reproductive system

Uterine Cavity 6, 30, 31,34,37

6.76 to 7.8

Mildly Acidic to Mildly Alkaline.

Upper Vagina 6, 30, 31,34,37

5.7

Moderately Acidic

Lower Vagina 6, 31,34,37

3.8 to 4.5

Weakly Acidic

Vaginal PH 6, 31,34,37

3.5- 4.5

Weakly Acidic.

The PH of GI tract is shown in Figure 6. The PH or the oral cavity is mildly acidic to mildly alkaline with a PH range of 6.8-7.5. The upper part of the stomach cavity is highly acidic with a PH of 1.5-2, and the lower part of the stomach has a mildly acidic to mildly alkaline with a PH ranging from 5.6-8. The PH of the small intestine is mildly alkaline with a PH ranging from 7.2-7.5. The large intestine has a mildly basic PH ranging from 7.9-8.5 .
The PH of some biological fluids are listed in Table 2. The PH values of bodily fluids are different. Blood, cerebrospinal fluid, pancreatic secretion, seminal vesicle gland fluid, and liquified semen fluid are mildly alkaline. Their PH’s range from 7.2 to 8.5. Stool, urine, prostate fluid, saliva, and gallbladder bile have a mildly acidic to mildly alkaline PH. Their PH’s range from 4.5 to 8. Sperm has a mildly acidic PH ranging from 6.5 to 6.9. The bodily fluid with the widest range of PH is urine. Its PH ranges from 4.5 to 8 .
Table 2. PH of Some Biological Fluids. Cite blood PH value ref after ref are numbered .

Fluid Type

PH Value

Acidic/ Basic/ Neutral

Cerebrospinal Fluid

7.3-7.36

Mildly Alkaline

Blood

7.35-7.45

Mildly Alkaline

Stool

6.5- 7.5

Mildly Acidic to Mildly Alkaline

Urine

4.5-8

Weakly Acidic to Mildly Alkaline.

Pancreatic Secretion

7.5-8

Mildly Alkaline

Seminal vesicle gland fluid

7.2-8.5

Mildly Alkaline

Prostate fluid

6.6-7.3

Mildly Acidic to Mildly Alkaline.

Sperm

6.5 to 6.9

Mildly Acidic

Liquified semen fluid

7.2-8

Mildly Alkaline

Gallbladder bile

6.8 to 7.65

Mildly Acidic to Mildly Alkaline.

Saliva

6.5-7.5

Mildly Acidic to Mildly Alkaline.

3. Conclusion
The mildly alkaline human organs and biological fluids are brain, small intestine, colon, bone, intrafollicular thyroid storage, blood, pancreatic secretion, seminal vesicle gland fluid, cerebrospinal fluid, and liquefied semen; their PHs range from 7.1-8.5. The mildly acidic to mildly alkaline human organs and biological fluids is the uterine cavity, intracellular thyroid follicular cells, gallbladder bile, rectum, stool, urine, saliva, and prostate fluid; their PHs range from 4.5-8. The weakly acidic human organ is the upper vagina, its PHs range from 3.8-4.5. The strongly acidic organ is the stomach with a PH of 1.5-3.5. The neutral to mildly alkaline human organs are heart and liver; their PHs range from 7-7.4. The skin has a weakly acidic to mildly acidic PH of 4-6.5.
Acknowledgments
We acknowledge the efforts of the Association of Consulting Chemists and Chemical Engineers for making our profiles available for clients worldwide.
Author Contributions
Hebah Abdel-Wahab: Conceptualization, Data curation, Methodology, Resources
Tamara Gund: Conceptualization, Data curation, Methodology, Resources
Joseph Bozzelli: Conceptualization, Data curation, Methodology, Resources
Conflicts of Interest
The authors declare no conflicts of interest.
References
[1] General Chemistry 11th edition, Ebbing and Gammon, Cengage Publishing, 2017, Boston, MA.
[2] LibreTexts Chemistry, Supplemental Modulus (Physical and Theoretical Chemistry). Accessed December 9, 2024,
[3] Malov YS, Kulikov AN. Bicarbonate deficiency and duodenal ulcer. Therapeutic Archive. 1998; 70(2): 28-32.
[4] Abdel-Wahab, H., Gund, T., & Bozzelli, J. (2026). PH of Food Products and the Suitable Diet for Individuals with Blood PH Imbalances. American Journal of Food and Nutrition, 14(1), 30-37.
[5] Ohman H, Vahlquist A. In vivo studies concerning a pH gradient in human stratum corneum and upper epidermis. Acta Dermato-Venereologica. 1994; 74(5): 375-379.
[6] Ferris DG, Francis SL, Dickman ED, Miler-Miles K, Waller JL, McClendon N. Variability of vaginal pH determination by patients and clinicians. Journal of the American Board of Family Medicine. 2006; 19(4): 368-373.
[7] Daniels, Lowri, 2020, Medical News Today, “PH of Blood, What to know”, accessed on February 3, 2025 from,
[8] Arora N, Jefferson J. Metabolic Acidosis. In: Papadakis MA, McPhee SJ, Rabow MW, et al., eds. Current Medical Diagnosis & Treatment 2022. McGraw Hill; 2022.
[9] Bargman JM, Skorecki K. Chronic Kidney Disease. In: Loscalzo J, Fauci A, Kasper D, et al., eds. Harrison’s Principles of Internal Medicine. 21st Edition. McGraw Hill; 2022.
[10] Merck Manual Consumer Version. Acidosis
[11] National Kidney Foundation. Metabolic Acidosis
[12] National Library of Medicine. Metabolic Acidosis
[13] Widmaier, E P; Raff, H; Strang, KT (2014). Vander's Human Physiology (12th ed.). McGraw-Hill Higher Education.
[14] Kent, Michael (2000). Advanced biology. Oxford: Oxford University Press. p. 81.
[15] "Botany/Plant structure".
[16] "New organ named in digestive system". BBC News. 2017. Archived from the original on 2018-03-24. Retrieved 2018-02-05.
[17] Wikipedia, 2026, “Organ Biology”, Accessed on February 4, 2026 from,
[18] National Cancer Institute, (n.d.), “Cervix”. Retrieved on February 11, 2026 from
[19] Tietz, Katharina & Klein, Sandra. (2018). Simulated Genital Tract Fluids and Their Applicability in Drug Release/Dissolution Testing of Vaginal Dosage Forms. Dissolution Technologies. 25. 40-51.
[20] Cryos, “The midwife explains: Hoe does the female reproductive system work?”, May 2024. Accessed on March 4th 2026 from
[21] WebMD, “Do You Really Know About the Male Reproductive System?”, January 19, 2024. Accessed on May 4th 2026 from
[22] Cleveland Clinic, “Male Reproductive System”, May 2023. Accessed from
[23] McMillan Cancer Support, 2026, “The Prostate”. Retrieved from
[24] National Institute of Health, December 2017, “Your Digestive System & How it works”. Accessed on March 9, 2026 from
[25] Shao, Dan, et al. "DeepSec: a deep learning framework for secreted protein discovery in human body fluids." Bioinformatics 38.1 (2022): 228-235.
[26] Creative Proteomics, 2026, “Biological Fluids: Functions, Analysis and Significance”. Retrieved on March 9, 2026 from
[27] Cleveland Clinic, May 2024, “Bile”. Retrieved on March 9, 2026 from
[28] Cleveland Clinic, July 2024, “Semen”. Retrieved from:
[29] Cleveland Clinic, August 2025, “Cerebrospinal Fluid”. Retrieved form
[30] Lykke MR, Becher N, Haahr T, Boedtkjer E, Jensen JS, Uldbjerg N. Vaginal, Cervical and Uterine pH in Women with Normal and Abnormal Vaginal Microbiota. Pathogens. 2021 Jan 20; 10(2): 90.
[31] Mirmonsef, P., Hotton, A. L., Gilbert, D., Gioia, C. J., Maric, D., Hope, T. J., Landay, A. L., & Spear, G. T. (2016). Glycogen Levels in Undiluted Genital Fluid and Their Relationship to Vaginal pH, Estrogen, and Progesterone. PloS One, 11(4), e0153553.
[32] Haugen, T. B., & Grotmol, T. (1998). pH of human semen. International Journal of Andrology, 21(2), 105-108.
[33] Tringen, 2022, “PH of Human Body Organs” Accessed on February 4, 2026 from
[34] Tarahomi, M., Zagers, M., Zafardous, S., Mohammadzadeh, A., Fathi, Z., Sareban, H., Fatemi, F., akhr., S., Hamer, G., Repping, S., Schrauwen, F., Straalen, P., Vaz, F., Wely, M., Mastenbroek, S., 2024,” In vivo human uterine temperature, PH, and uterine fluid composition analysis” Preprint, BioRxiv,
[35] Caspi M., , Wittenstein A, Kazelnik M., Shor-Nareznoy Y. , Rosin-Arbesfeld A. ,”Therapeutic targeting of the oncogenic Wnt signaling pathway for treating colorectal cancer and other colonic disorders”, Advanced Drug Delivery Reviews, Volume 169, 2021, Pages 118-136,
[36] Virreira M, Jin L, Djerbib S, De Deken X, Miot F, Massart C, Svoboda M, Van Sande J, Beauwens R, Dumont JE, Boom A. Expression, Localization, and Regulation of the Sodium Bicarbonate Cotransporter NBCe1 in the Thyroid. Thyroid. 2019 Feb; 29(2): 290-301.
[37] Esco Medical, February 2024, “ PH and Infertility”. Retrieved from
[38] Blacklock, N., Beavis, J., The Response of Prostatic Fluid pH in Inflammation, BJUI, October 1974, 46(5): 537-542,
[39] News Medical Life Sciences, 2022, “PH in the Human Body”. Accessed on February 11, 2026 from
[40] WebMD, August 2025, “What to Know about Urine PH Test”. Retrieved from
[41] Michigan Medicine Laboratories, 2026, “PH Stool”. Retrieved from
[42] Mitchell, R. A., Carman, C. T., Severinghaus, J. W., Richardson, B. W., Singer, M., Shnider, S., Stability of cerebrospinal fluid pH in chronic acid-base disturbances in blood, Journal of Applied Physiology, 20(3), 125-135,
[43] Procházková, Nicola; Laursen, Martin F.; La Barbera, Giorgia; Tsekitsidi, Eirini; Jørgensen, Malte S.; Rasmussen, Morten A.; Raes, Jeroen; Licht, Tine R.; Dragsted, Lars O.; Roager, Henrik M. (December 2024). "Gut physiology and environment explain variations in human gut microbiome composition and metabolism". Nature Microbiology. 9 (12): 3210-3225.
[44] Health Matters, "What is Stool PH? High and low values | Lab results explained", February 2019. Retrieved from
Cite This Article
  • APA Style

    Abdel-Wahab, H., Gund, T., Bozzelli, J. (2026). The Chemistry of Some Internal Human Organs and Its Biological Fluids. American Journal of BioScience, 14(4), 89-95. https://doi.org/10.11648/j.ajbio.20261404.11

    Copy | Download

    ACS Style

    Abdel-Wahab, H.; Gund, T.; Bozzelli, J. The Chemistry of Some Internal Human Organs and Its Biological Fluids. Am. J. BioScience 2026, 14(4), 89-95. doi: 10.11648/j.ajbio.20261404.11

    Copy | Download

    AMA Style

    Abdel-Wahab H, Gund T, Bozzelli J. The Chemistry of Some Internal Human Organs and Its Biological Fluids. Am J BioScience. 2026;14(4):89-95. doi: 10.11648/j.ajbio.20261404.11

    Copy | Download

  • @article{10.11648/j.ajbio.20261404.11,
      author = {Hebah Abdel-Wahab and Tamara Gund and Joseph Bozzelli},
      title = {The Chemistry of Some Internal Human Organs and Its Biological Fluids},
      journal = {American Journal of BioScience},
      volume = {14},
      number = {4},
      pages = {89-95},
      doi = {10.11648/j.ajbio.20261404.11},
      url = {https://doi.org/10.11648/j.ajbio.20261404.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajbio.20261404.11},
      abstract = {PH is a scale from 0-14 used to determine if substances or mediums are acidic, alkaline or neutral. Blood is a buffer solution with a PH of 7.4, and it resists change in PH as it contains week conjugate acid and base pair; carbonate HCO3- and carbonic acid H2CO3. Mediums and solutions can be either acidic, alkaline or neutral; acidic if their measured PH is less than 7, neutral if their measured PH is 7, and alkaline if their measured PH is greater than 7. An organ can be made of different types of tissues that combine to form an organ. An organ system or a biological system is when two or more organs work together in execution of a body function. Reproductive organs in men or women are organs involved in the producing of children and involved in sexual function. The series of hollow organs joined in a long tube from mouth to anus is the GI tract. Biological fluids are Liquids within living organisms; each has a distinct physiological role. These fluids can be either extracellular or intracellular. The objective is to determine and list the PH of some internal human organs and their biological fluids based on their acidity or alkalinity. The PH of some internal human organs is listed in Table 1 and the PH of some biological fluids are listed in Table 2.},
     year = {2026}
    }
    

    Copy | Download

  • TY  - JOUR
    T1  - The Chemistry of Some Internal Human Organs and Its Biological Fluids
    AU  - Hebah Abdel-Wahab
    AU  - Tamara Gund
    AU  - Joseph Bozzelli
    Y1  - 2026/08/18
    PY  - 2026
    N1  - https://doi.org/10.11648/j.ajbio.20261404.11
    DO  - 10.11648/j.ajbio.20261404.11
    T2  - American Journal of BioScience
    JF  - American Journal of BioScience
    JO  - American Journal of BioScience
    SP  - 89
    EP  - 95
    PB  - Science Publishing Group
    SN  - 2330-0167
    UR  - https://doi.org/10.11648/j.ajbio.20261404.11
    AB  - PH is a scale from 0-14 used to determine if substances or mediums are acidic, alkaline or neutral. Blood is a buffer solution with a PH of 7.4, and it resists change in PH as it contains week conjugate acid and base pair; carbonate HCO3- and carbonic acid H2CO3. Mediums and solutions can be either acidic, alkaline or neutral; acidic if their measured PH is less than 7, neutral if their measured PH is 7, and alkaline if their measured PH is greater than 7. An organ can be made of different types of tissues that combine to form an organ. An organ system or a biological system is when two or more organs work together in execution of a body function. Reproductive organs in men or women are organs involved in the producing of children and involved in sexual function. The series of hollow organs joined in a long tube from mouth to anus is the GI tract. Biological fluids are Liquids within living organisms; each has a distinct physiological role. These fluids can be either extracellular or intracellular. The objective is to determine and list the PH of some internal human organs and their biological fluids based on their acidity or alkalinity. The PH of some internal human organs is listed in Table 1 and the PH of some biological fluids are listed in Table 2.
    VL  - 14
    IS  - 4
    ER  - 

    Copy | Download

Author Information
  • Department of Biology, Chemistry and Physics, Essex County College, Newark, United States; Department of Chemistry and Biochemistry, Saint Joseph University, Philadelphia, United States

  • Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, United States

  • Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, United States