Transport in Animals - Post test

Question 1

Explain how the vein is adapted for its function?

Answer 1

1. Its made up of smooth muscle and elastic fibres

The smooth muscle withstands high pressure of blood
the elastic fibres allow the wall to stretch and recoil.

Question 2

State two ways in which the Capillary is adapted to its function?

Answer 2

One cell thick to allow short diffusion path

Gaps and pores allow fenestrations between cells.

Question 3

What is the function of tissue fluid?

Answer 3

Allows exchange between blood and cells of oxygen which is delivered to cells

and carbon dioxide/urea which is removed from cells.

Question 4

What happen to remaining tissue fluid?

Answer 4

1. Enters the lymphatic vessel and passes back into blood system.