Answer to Question #143219 in Zoology for Zoology student#

Question

Discuss the process of gas exchange in your lung fishes

Answer 1

Lungfish have a highly specialized respiratory system. Their lungs are connected to the larynx and pharynx without a trachea. Their lungs are subdivided into numerous small air sacs to maximize the surface area for gas exchange.

In order to breathe, the fish swims upward and position its head so that the tip of the snout barely touches the water surface. The mouth is then opened wide, and the fish sucks in air from just above the water. Lungfish have opening (choana) that connects the nasal cavity with the mouth.