1How does transportation take place in a unicellular animal such as an amoeba?
2How does transportation take place in a multicellular animal of the sponge group such as sycon?
3Why does a hydra not need blood, even though it is far larger than an amoeba?
4Describe the blood circulatory system and say what each of its parts does.
5What is diffusion, and why is it so important in this topic?
6Does blood carry oxygen right into a cell? Explain carefully.
7Explain why an animal that is solid and thick has no choice but to have a heart and blood vessels.
8Why does your pulse become faster when you run?
9A student says that bigger animals always need blood. Give an example that proves this wrong and explain what the student has measured incorrectly.
10Give one reason why transportation in a plant does not need a pump but transportation in a large animal does.