ICSE Class 9 Answered
Give reasons:(a) The glottis is guarded by epiglottis. (b) The alveoli are covered with blood capillaries.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a) The glottis is guarded by epiglottis to prevent the entry of food into the trachea during swallowing.
(b) Alveoli is covered with blood capillaries for the easy diffusion of respiratory gases, since both alveoli and blood capillaries are thin-walled.
(b) Alveoli is covered with blood capillaries for the easy diffusion of respiratory gases, since both alveoli and blood capillaries are thin-walled.
Answered by | 04 Jun, 2014, 03:23: PM
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