Circulation

Question 1

Describe where the systemic and pulmonary circulation systems transport blood to.

Answer 1

• Systemic circulation: Left side of heart to Tissues and organs of the body Back to right side of heart
• Pulmonary circulation Right side of heart to Lungs Back to left side of heart

Question 2

What does the coronary artery come from and what does it do?

Answer 2

Coronary arteries – branch from aortic arch, delivering oxygenated blood to the cardiac muscle.

Question 3

What is the function of the aorta?

Answer 3

Aorta – takes oxygenated blood from heart to the respiring tissues.

Question 4

What is the function of the Vena cava?

Answer 4

Vena Cava – takes deoxygenated blood from the respiring tissues to the heart.

Question 5

What is the function of the Pulmonary artery?

Answer 5

Pulmonary artery – takes deoxygenated blood from the heart to the lungs.

Question 6

Where does the hepatic artery take blood to and from?

Answer 6

Hepatic artery – takes oxygenated blood from aorta to the liver.

Question 7

What does the hepatic portal vein carry? Where does it go?

Answer 7

Hepatic portal vein – takes deoxygenated, nutrient rich blood from the intestines to the liver.

Question 8

Where do the left and right renal arteries supply?

Answer 8

The kidneys

Question 9

Tell me about the layers you find in arteries and veins

Answer 9

• Three layers surrounding a central blood carrying canal (the lumen).

The outer layer.

 Composed mainly of collagen – tough.

 Smooth muscle cells may be present, particularly in veins.

 Often the most prominent layer in the walls of veins.

The middle layer.

 Composed mainly of smooth muscle.

 Reinforced by layers of elastic tissue.

Inner lining:

 A lining layer of flattened epithelial cells termed endothelium.

 Sits on a basement membrane.  The only layer that is present in all blood vessels

Question 10

Name the type of blood vessels in order which carry the blood from the heart and back to the heart.

Answer 10

Heart Aorta Arteries Arterioles Capillaries Venules Veins Vena Cava Heart

Question 11

How can you tell this is an artery?

Answer 11

Lots of elastic tissue

Small lumen

Thick walls

Question 12

Which feature shows this is likely to be a vein?

Answer 12

Valves! The only arteries with valves are leaving the heart. (semi-lunars)

Question 13

What is this?

Answer 13

A capillary - one cell thick

Flattened endothelium

small lumen