Adaptations Of The Structure Of Blood Vessels To Their Functions

Question 1

Artery

Answer 1

• A small Lumen to maintain a high blood pressure
• A thick wall consisting of muscle and elastic fibres yo maintain a blood flow.
• A thick wall allow blood to flow at high pressure

Question 2

Vein

Answer 2

• It has a thin wall as blood flows at low pressure
• It has a large Lumen as blood flows at low pressure
• It has a thin wall consisting of less muscle because blood flows at low pressure
• presence of valves to prevent backflow of blood

Question 3

Capillary

Answer 3

• It is one cell thick wall which allows the exchange of substances between blood and surrounding cell