Question

Give Reasons:-
1. Trachea is made of cartilaginous rings.
2. Heart is divided by a muscular wall called septum.
3. Small intestine has finger like projections called villi.

Answer 1

2.heart is divided by septum to prevent mixing of oxygenated and deoxygenated blood..
3.villi absorbs the digested food from the alimentary canal..
1.trachea is made of rings called trachieols which channels the air diectly into the cells of the tissue..
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Answer 2

the trachea is made of cartilaginous rings to prevent the damage of wind pipe
hear is divided by a muscular wall called steptem to prevent from mix of oxygenated and dioxygenateted blood
small intestine has finger like projections to absorb digested food