3.2.1 The Need for Transport Systems in Animals

Question 1

WHy

Answer 1

Increasing BMR, decreasing SA:V ratio, increasing diffusion distance

Question 2

What do mass transport systems do?

Answer 2

• Transport materials in bulk, involving some sort of force
• Brings substances from one exchange site to another
• Maintain diffusion gradients at exchange sites
• Ensure effective cell activity
  Eg. Circulatory System