Question

Q22. Give reasons for the following:
(i) The glottis is guarded by epiglottis.
(ii) The lung alveoli are covered with blood capillaries.
(iii) The wall of trachea is supported by cartilage rings,​

Answer 1

Answer:

I hope this helps:

Explanation:

( i ) The glottis is guarded by the epiglottis because it prevents food from entering the wind pipe.

( ii ) The lung alveoli are covered with blood vessels because the oxygen that we inhale dissolves in the blood, present in these capillaries only, which we inhale.

( iii ) The wall of trachea is supported by cartilage rings because these rings provide the air passage from collapsing

Answer 2

Earth is a good planet planet planet