Transport in animals. Flashcards
1
Q
What three main factors influence the need for a transport system?
A
- Size
- Surface area to volume ratio
- Level of metabolic activity.
2
Q
What is a single circulatory system?
A
Blood flows through the heart once for each circuit of the body.
3
Q
What is a double circulatory system?
A
Blood passes through the heart twice in a circuit.
4
Q
What is a closed circulatory system?
A
Where blood is enclosed in vessels.
