the heart.

Question 1

superior vena cava

Answer 1

responsible for returning the deoxygenated blood from the body back to the heart.

Question 2

Aorta

Answer 2

carries blood from the heart to the circulation system.

Question 3

pulmonary artery

Answer 3

carries the deoxygenated blood from the right ventricle the the lungs for oxygenation.

Question 4

Pulmonary Vein

Answer 4

carries oxygenated blood from the lungs to the left atrium of the heart.

Question 5

bicuspid valve

Answer 5

controls the blood flow and the amount of blood that passes through. it prevents backflow of blood.

Question 6

aortic valve

Answer 6

it separates the lower left chamber (left ventricle) and the bodies main artery.

Question 7

Pericardium

Answer 7

Double-layered membrane surrounding the heart.

Question 8

interior vena cava

Answer 8

it transports the deoxygenated blood from the lower extremities and abdomen back to the right atrium of the heat.

Question 9

tricuspid value

Answer 9

the flaps open to allow blood to pass from the upper right chambers to the lower right chambers.

Question 10

pulmonary value

Answer 10

between the lower right chamber (right ventricle) and the artery that delivers blood to the lungs.

Question 11

What are coronary arteries?

Answer 11

they supply the heart muscle with blood carrying oxygen and nutrients. they run on the outside of the heart and send smaller branches into the heart.

Question 12

what is the inside of a coronary artery called?

Answer 12

lumen.

Question 13

what can build up in the coronary arteries?

Answer 13

plaque/atheroma/fatty deposit

Question 14

what is the effect of the build up of fatty deposit in the coronary arteries?

Answer 14

a reduced amount of blood is able to flow around the heart, therefore making it more difficult for oxygen to move around the cells. which leads to heart attacks.

Question 15

give 3 factors that cause the build up of fatty deposit.

Answer 15

1. lifestyle diet (each to many saturated fats, containing lots of LDL cholesterol)
2. not getting enough exercise.
3. smoking (as it breaks down the artery and reduces blood flow).

Question 16

What is good cholesterol called?

Answer 16

HDL for example margarine made with sunflower oil.

Question 17

what is the role of the pulmonary circuit?

Answer 17

the deoxygenated blood becomes oxygenated.

Question 18

describe the role of the pulmonary circuit in the blood.

Answer 18

deoxygenated blood > gets pumped out of the right ventricle > to the pulmonary artery > through the lungs > to the pulmonary vein > where it returns to the left atrium oxygenated.

Question 19

what is the role of the systemic circuit?

Answer 19

the deliver the oxygenated blood around the body (everywhere)

Question 20

describe how the blood passes though the systemic circuit?

Answer 20

oxygenated blood > pumped out of the left ventricle > aorta > around the body tissues and head > vena cava > returns to the right atrium deoxygenated.

Question 21

explain what is meant by the heart being a ‘double pump’.

Answer 21

there are 2 different circuits that the blood takes when the blood is being released from each heart beat.