Question

Q17. Do the fishes have lungs for respiration?
Q18. Do the size of the chest cavity increases during inhalation ?​

Answer 1

Q17. Answer

Unlike humans, fishes don't have lungs for respiration. ... Fishes take in water through mouth and pore it over gills. Gills have network of capillaries that picks up dissolved oxygen

Q18.Answer

During inspiration, the diaphragm contracts and pulls downward while the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside. As a result, air rushes in and fills the lungs.

Hope it helps....

Answer 2

Explanation:

2. I think so ..........................