Part 3 Flashcards
1
Q
How are veins adapted for their function?
A
Bigger lumen than arteries and thinner walls as blood flows at lower pressure. Have valves to prevent backflow of blood.
2
Q
How are capillaries adapted for their function?
A
Permeable walls and only one cell thick for efficient diffusion of gases.
3
Q
What is a stimulus?
A
A change in the environment
