Name some features of an exchange surface that allow efficient diffusion?

How does gas exchange take place in an insect

What two adaptations do insects have to prevent excessive water loss?

Describe the structures in a fish that are used in the gas exchange system?

What type of exchange system do fish use and explain why?

What structures in leaves control the rate of gas exchange and also water loss?

Name the features of a transport system such as humans?

Why do mammals have a double circulatory system?

What is tissue fluid made up of?

What forces tissue fluid out of the blood plasma and what remains after?

What other system returns tissue fluid to the circulatory system?

Name the two methods in which water can move through the root

Why does water enter the xylem and what pressure does this create?

Name 4 factors that can affect transpiration?

Name some adaptations of a xerophytes plant?