Comparative Anatomy

Question 1

Sharks main respiratory organ

Answer 1

Gills

Question 2

Gills function

Answer 2

Packed with blood capillaries for oxygen to turn into carbon dioxide to diffuse out of

Question 3

Where air goes

Answer 3

Oxygen dissolves in the sea water and there waste carbon dioxide dissolves onto sea water

Question 4

Gas exchange

Answer 4

Takes place on the surface of millions of tiny flat lamellas that lie along top thin strands that make gills

Question 5

To stay alive ______

Answer 5

Sharks must always have water over gills

Question 6

Where take water

Answer 6

Take water in mouth and some sharks of hole in head so they also take water in from the holes

Question 7

Grasshopper breathing

Answer 7

Use 10 pairs of holes along the sides of their bodies calls spiracles, connect a network of tubes to their bodies called trachea

Question 8

Tracheas branch out ______

Answer 8

Getting smaller and smaller so they extend right through the body

Question 9

Diffuse air

Answer 9

Oxygen and carbon dioxide diffuse directly between the cells and tracheas

Question 10

In 1 breath

Answer 10

1-the front four pairs of spiracles open and the back six close
-body muscles relax and expand, drawing air in the front of spiracles
2-the front four pairs of spiracles close and the back six open
-body muscles contract forcing air out of the back spiracles