Transport In Animals

Question 1

What is the need for a transport system in multicellular animals

Answer 1

• metabolic demands of most multicellular animals is high
• surface area to volume ratio is too big. The surface area is too small to maintain the demand. The diffusion distance is too big
• molecules such as hormones or enzymes may be made in one place but needed in another
• food will be digested in one system but the nutrients may be needed in another
• waste products of metabolism need to be removed from the cells and transported to the excretory organs

Question 2

What are the features that most circulatory systems have in common

Answer 2

• they have liquid transport medium that circulates around the system (blood)

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