Question

respiration in crocodiles and dolphins

Answer 1

Dolphins:-
(i) In dolphins, they have a hole through which they breathe.
(ii)For them to be able to breathe, they have to rise to the surface and breathe in the oxygen.
(iii)When a dolphin breathes in air, it goes directly into the lungs ,exhaling and inhaling rarely o.3 seconds and it takes 2-3 breathes per minute on average.

Crocodiles:-
(i) The crocodiles breathe though trachea, which connects mouth and lungs where air is inspired and expired.
(ii)They have a palate to separate breathing and eating tubes.
(iii)Similarly, they also have another palate preventing water entering their gullet so that they can swim in water with mouth open.