Visual receptor
The layer of rods and cones that are the visual cells of the retina.
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- Vital
Necessary to maintain life. For example, breathing is a vital function.
- Vital bodily function
“Ostomy surgery is a life-enhancing procedure that restores a vital bodily function.”
- Vitamin A
An essential factor in the formation of blood clotting factors. Deficiency can lead to abnormal bleeding.
- Vitamin A deficiency
14 million pre-school children have some eye damage due to VAD; 350 000 (or more) pre-school children become partially or totally blind every year from VAD; About 60% of these children die within a few months of going blind; VAD is associated with an increase in the severity of infections, particularly measles and diarrheal disease; […]
- Vitamin B -- nicotinic acid
Mental disorientation, confusion, delusions and depression Death, if untreated. Pellagra, once a puzzle, was solved by Joseph Goldberger (1874-1929). Serving in the Public Health Service, Dr. Goldberger proposed that pellagra was due to a nutritional deficiency and in 1915 began experiments with Mississippi prison inmates (who “volunteered” in return for full pardons). Dr. Goldberger fed […]