Given alongside is an outline diagram of a human body showing the position of certain organs.


(a) Name the parts numbered 1 to 4.


(b) What is common to all these parts in regard to the nature of their function?


(c) Name the nutrient element which is essential for the normal working of part 2.

(a) 1- Pituitary


2- Thyroid


3- Pancreas


4- Adrenal gland


(b) All the glands are endocrine glands. They pour their secretions directly into the bloodstream.


(c) Iodine is essential for the normal working of the thyroid gland.


It is an active ingredient in the synthesis of thyroxine hormone.


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