Gas Exchange in Bony Fish: OCR AS Level

Get Revising

Created by: Aleena
Created on: 26-10-18 13:35

The 2 groups of fish?

Teleosts (Bony Fish-skeleton made of bone) and Elasmobranchs (Fish-skeleton made of cartilage)

1 of 5

What is the gas exchange organ of fish?

Gills

2 of 5

How does the Gills increase their surface area?

the gills are divided into gill filaments-then each gill filament is divided into lots gill lamellae(or gill plates)-lots of oxygen can be absorbed all at once

3 of 5

Adaptions of lamellae for efficient gas exchange?

Well supplied with blood vessels-maintains steep concentration gradients & are v.thin-short diffusion pathway of oxygen from water to the blood . As fish live in water-gills are always moist,to dissolve gases so they can diffuse

4 of 5

heloo

djb

5 of 5