Mention the rote of vitamin A Vitamin D in human body .write the Chactristies of meristenatic tissue
Answers
Answer:
Vitamin A plays a significant role in the regulation of calcium and maintenance of phosphorus levels in the blood. These factors are vital for maintaining healthy bones. People need vitamin D to allow the intestines to stimulate and absorb calcium and reclaim calcium that the kidneys would otherwise excrete.
The characteristics of meristematic tissue are as follows:
The cells of these tissues are commonly called meristems.The meristematic tissue has the quality of self-renewal. ...They have very small and few vacuoles.The meristematic tissue is living and thin-walled.The protoplasm of the cells is very dense.
Explanation:
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Answer:
Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, and several provitamin A carotenoids (most notably beta-carotene).[1][2][3] Vitamin A has multiple functions: it is important for growth and development, for the maintenance of the immune system, and for good vision.[4][5] Vitamin A is needed by the retina of the eye in the form of retinal, which combines with protein opsin to form rhodopsin, the light-absorbing molecule[6] necessary for both low-light (scotopic vision) and color vision.[7] Vitamin A also functions in a very different role as retinoic acid (an irreversibly oxidized form of retinol), which is an important hormone-like growth factor for epithelial and other cells.[5][8]