Williams, Roger J. Formerly, Department of Chemistry, University of Texas, Austin, Texas.
Davis, Donald R. College of Natural Sciences, Clayton Foundation Biochemical Institute, University of Texas, Austin, Texas.
Show previous versions
- Nutrition in humans and other mammals
- Nutritional requirements
- Nonessential substances involved in nutrition
- Foods and nutrition
- Relationship of nutrition and disease
- Links to Primary Literature
- Additional Readings
The science of nourishment, including the study of the nutrients that each organism must obtain from its environment to maintain life and health and to reproduce. Nutrition is essential for survival. Organisms nourish themselves by assimilating the nutrients from their surroundings and from the foods that they consume (Fig. 1), and then using those nutrients to meet their requirements for energetic activity, metabolism, growth, and tissue repair and replacement. Although each kind of organism has distinctive nutrition needs, the underlying biochemical unity in nature gives coherence to the subject. Many nutrients, including amino acids, minerals, and vitamins, required by higher organisms may also be needed by the simplest forms of life, including single-celled bacteria and protozoa. Recognition of this fact has made possible highly important developments in biochemistry. See also: Biochemistry; Energy metabolism; Food; Metabolism
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Its dedicated editorial team is led by Sagan Award winner John Rennie. Contributors include more than 9000 highly qualified scientists and 42 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 17,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information