Circulatory System Flashcards
1
Q
What is the need for circulatory systems?
A
Small SA:V
Metabolic demands
Transport substances
2
Q
Closed circulatory system
A
Blood is contained in vessels
3
Q
Advantages of double closed circulatory systems
A
High pressure
more oxygen delivered to cells
4
Q
Double circulatory system
A
Blood passes through the heart twice in each circuit
5
Q
Adaptions of veins
A
thin outer wall
large lumen
thin layer of elastic and muscle fibres
6
Q
Adaptions of capillaries
A
small lumen
only one cell thick
7
Q
Adaptions of arteries
A
small lumen
thick outer wall
thick muscle and elastic layers
