Question

Units of kidney, lungs, small intestine and brain

Answer 1

Answer:

1. The functional unit of kidney is the nephron. They are present in medulla in kidneys.

2. The functional unit of lungs is alveoli. These are tiny air sacs in which exchange of gases takes place.

3. The functional unit of small intestine is intestine villi. These help in absorption, digestion, secretion and immune defense.

4. The functional unit of brain is neuron. It's function is to send and receive electric impulses.

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