the heart

Question 1

what is the heart’s function

Answer 1

to pump blood. right side pumps through pulmonary circuit, left pumps blood through systemic circuit.

Question 2

what is the pulmonary circuit

Answer 2

part of the circulatory system that involves right side of the heart, lungs, and blood vessels that connect them together.

Question 3

what is the systemic circuit

Answer 3

part of the circulatory system that includes the left side of heart, rest of body (not lungs tho), and blood vessels that connect them together.

Question 4

why are the walls of the left side of the heart thicker

Answer 4

because it needs to put the blood under higher pressure than the right side

Question 5

valves function

Answer 5

to prevent blood from flowing backwards

Question 6

what is coronary heart disease

Answer 6

build-up of fatty plaques containing cholesterol in the coronary artery causing the blood supply to part of the heart muscle to be cut off. that part of heart cannot continue to contract, causing a heart attack

Question 7

what are causes of cornanry heart disease

Answer 7

poor diet – eating more saturated fat tends to increase cholesterol levels. stress and smoking – increases blood pressure. salt – eating too much causes high blood pressure. lack of exercise. genetic factors