Circulation & Blood Vessels Flashcards
1
Q
Why do large organisms need a transport system
A
Because they have a small surface area to volume ratio, so diffusion is too slow
2
Q
Give an example of a transport system
A
The circulatory system in humans
3
Q
Why do organisms need a transport system
A
Increasing size means a decrease in the SA:VOL ratio, so we can’t rely on simple diffusion and need to develop a specialized transport system to carry raw materials from specialized exchange organs to cells
4
Q
How many miles of blood vessels does the body contain
A
60,000 miles
5
Q
What are the features of a transport system
A
