Circukatory System - BLOOD VESSELS

Question 1

What are the main distinguishing features between arteries and veins?

Answer 1

ARTERIES
- carry blood away from heart
- thick elastic muscular walls
- no valves
- high pressure blood flow
VEINS
- carry blood to the heart
- thin non elastic walls
- valves present
- low pressure blood flow

Question 2

Explain he role of valves in the veins

Answer 2

Valves only allow movement of blood in one direction.valves are present in veins to help blood travel against gravity toward the heart and prevent backward flow of blood

Question 3

What is the main role of the capillaries?

Answer 3

Capillaries are sights for the transfer of oxygen and other nutrients from the blood stream to other tissues in the body; they also collect Co2 waste material and fluids for return to the veins

Question 4

What is systolic blood pressure?

Answer 4

When your heart beats, it contracts and pushes blood through the arteries to the rest of your body, this force creates pressure to the arteries. This is called systolic blood pressure
Normal = 120
(Top number)

Question 5

What is diastolic blood pressure?

Answer 5

Indicates the pressure in the arteries when the heart rests between beats
80 or less = normal
(Bottom number)

Question 6

List the 5 main types of blood vessels

Answer 6

Veins
Arteries
Arterioles
Capillaries
Venules