ANN/SUA 7 lig. 171 shows two microscopic structures that are adapted for absorption, one from an animal and the other from a plant. The structures are not drawn to the same magnification. structure D structure E Fig. 17.1 a) State one feature that these two structures have in common that helps them to cary out their function. b) Identify each structure and, for each one, name two chemical substances that are absorbed by it. structure D: name chemical substance 1.. 2. structure E: name chemical substance 1. . 2. (6] c) Structure E in Fig. 17.1 is a single cell. Draw in and label, on Fig. 17.1, a feature that helps the cel to carry out absorption. [1] d) Explain how the feature you have drawn and labelled helps the cell to carry out absorption.
Essential nutrients
These are the organic compounds present in the food that provide nourishment essential for the development and growth of our body. Nutrients not only provide us with the required energy to carry out various biological processes but are also the building blocks for repair and growth in our bodies.
Vitamins
The vitamins are organic molecules required in low concentration for the proper functioning of the body. They cannot be generated in the organism and are taken into the body through the diet. The lack of proper vitamins results in diverse deficiency disorders. They are thus called essential nutrients. The important vitamins are vitamin A, vitamin B complex, vitamin C, vitamin D, vitamin K, and vitamin E.
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