Circulatory System - The Heart

Question 1

what is the circulatory system made up of

Answer 1

heart, blood vessels and blood

Question 2

what are the two systems that are joined to make the double circulatory system

Answer 2

pulmonary circuit
systemic circuit

Question 3

what happens in the pulmonary circuit

Answer 3

right ventricle pumps deoxygenated blood from the body to the lungs, where gas exchange takes place, and then back to the heart

Question 4

what happens in the systemic circuit

Answer 4

pumps oxygenated blood from the lungs to the heart and then to the rest of the body

Question 5

what is the heart

Answer 5

a pumping organ that keeps blood flowing around the body

Question 6

why does the heart have valves

Answer 6

to make sure that blood flows in the right direction - prevents it from flowing backwards

Question 7

what are the four chambers in the heart

Answer 7

right atrium, left atrium, right ventricle and left ventricle

Question 8

what is the process of the blood travelling through the heart

Answer 8

De-oxygenated blood comes into the right atrium from the body, moves into the right ventricle and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle and out to the body’s tissues through the aorta.

Question 9

how does the heart make sure that it gets all the oxygenated blood

Answer 9

Arteries called coronary arteries branch off the aorta and surrounds the heart, making sure that it gets all the oxygenated blood it needs