Question

(a) Draw a diagram of human respiratory system and label the following :
(i) The part where air is filtered by fine hair and mucus.
(ii) The part that terminates in balloon-like slructures.
(iii) Balloon-like structures where exchange of gases takes place.
(iv) The part that separates chest cavity from abdominal cavity.
(b) Why is the rate of breathing in aquatic organisms muds faster than in terrestrial organisms ?


CBSE Class X Science LA (5 Marks)

Answer 1

(i) Nasal passage                              (ii) Bronchioles

(iii) Alveolar sac              (iv) Diaphragm

(b) Since the amount of dissolved i'nyyeu in water is fairly low as compared to the amount of oxygen in the air, the rate of breathing in aquatic organisms is much faster than that in terrestrial organisms

Answer 2

Answer:

(i) Nasal passage                              (ii) Bronchioles

(iii) Alveolar sac              (iv) Diaphragm

(b) Since the amount of dissolved i'nyyeu in water is fairly low as compared to the amount of oxygen in the air, the rate of breathing in aquatic organisms is much faster than that in terrestrial organisms

Explanation: