CIRCULATORY SYSTEM Flashcards
1
Q
What factors decide whether the organism has a specialised transport system & whether there is a pump
A
1) the SA:V
2) how active the organism is
2
Q
What are the features of transport systems
A
1) suitable medium - to carry materials (usually lquid based on water but can be gas)
2) form of mass transport
3) closed system of tubular vessels that contain the transport medium
4) mechanism for moving the transport medium within vessels
3
Q
Why are the meduims in transport system usually liquid based on water
A
water readily dissolves substances and can be moved around easily
4
Q
What do plants rely on for a transport system
A
natural, passive proccess e.g. evaporation
