Question

Give reasons for the following:
(CBSE)
(a) The glottis is guarded by the epiglottis,
(b) The alveoli in lungs are covered with blood
capillaries
(c) The wall of trachea is supported by cartilage
rings​

Answer 1

Answer:

a -the glottis is guarded by the epiglottis because when we swallow the food then epiglottis cover the glottis so that the food particles cannot go in the trachea

C-the wall of trachea is supported by cartilage rings because when there is no air in trachea then trachea will not collapse because of cartilage ring .It protect the trachea from collapse.