Blood Vessels

Question 1

What are blood vessels?

Answer 1

Network of tubes that circulate the blood throughout the body

Question 2

Arteries

Answer 2

Carry oxygenated blood away from the heart.

Blood: Oxygenated
Direction: Away from the
heart
Pressure : High pressure
Size of lumen: Narrow lumen
Muscular wall thickness: Thick walls
Valves?: No valves

Question 3

Veins

Answer 3

Carry deoxygenated blood to the heart.

Blood: Deoxygenated
Direction: Towards from the
heart
Pressure : Low pressure
Size of lumen: Wide lumen
Muscular wall thickness: Thin walls
Valves?: Has valves

Question 4

Capillaries

Answer 4

Connect the arteries and veins which allows diffusion of gases and nutrients from blood into the body cells.

Blood: Both oxygenated and deoxygenated
Direction: From arteries to veins
Pressure : Very low pressure
Size of lumen: Very small
Muscular wall thickness: 1-cell thick
Valves?: No valves