3.2

Question 1

The. heart definition

Answer 1

a muscular organ that fills with blood returning from the body in the veins and contracts to force blood away through the arteries

Question 2

what does the heart do

Answer 2

the heart is a pump that contacts forcing blood throughout the body via the blood vessels delivering nutrients to the working muscles and removing waste products such as carbon dioxide

Question 3

right side of the heart

Answer 3

pulmonary circuit delivers deoxygenated j blood to the lungs

Question 3

the hearts 4 chambers name

Answer 3

right atrium left atrium at the top right ventricle and the left ventricle at the bottom

Question 3

valves

Answer 3

prevent blood from flowing backwards as the chambers contract

Question 3

right ventricles

Answer 3

pumps deoxygenated blood to the lungs throughout the pulmonary circuit

Question 3

ventricles

Answer 3

the two chambers at the base of the heart have thick muscular walls to pump blood throughout the body

Question 3

as the atria contracts

Answer 3

blood is forced directly downwards and into the ventricles the ventricles have thick muscular walls as they need to pump blood over much greater distance

Question 3

left side

Answer 3

the systemic circuit delivers oxygenated blood to the body tissue

Question 3

right atrium

Answer 3

feels with deoxygenated blood returning from the body

Question 4

atria

Answer 4

the two chambers a6 the top of the heart contract forcing blood downwards into the ventricles

Question 4

left ventricles

Answer 4

pumps deoxygenated blood to the body through the systemic circuit

Question 4

left atrium

Answer 4

fills with oxygenated blood returning from the lungs

Question 5

atrio ventricular valves

Answer 5

located between the atria and ventricles prevent blood from flowing back into the atria as the ventricles contract

Question 6

semi lunar valves

Answer 6

located at the entrance to the two arteries that direct blood away from the ventricles prevent blood from flowing back into the ventricles

Question 7

vena cava

Answer 7

a vein that carries deoxygenated blood from the body tissues to the right atrium

Question 8

pulmonary artery

Answer 8

an artery that carries deoxygenated blood from the right ventricle to the lungs

Question 9

pulmonary vein

Answer 9

a vein that transports oxygenated blood from the lungs to the left atrium

Question 10

aorta

Answer 10

an artery that transports oxygenated blood from the left ventricle to the body tissues

Question 11

the pulmonary circuit

Answer 11

Deoxygenated blood to the lungs
the cycle begins has deoxygenated blood returns to the right side of the heart having released its oxygen into the body tissues it flows through the vena cava and into the right atrium gradually filling the chamber once full the atrium contracts forcing blood downwards through the atrioventricular valve and into the right atrium the atrium contracts forcing blood through the atria ventricular valve and into the right ventricle the ventricle contracts forcing blood through the semi lunar valve and into the pulmonary artery blood flows to the lungs

Question 12

the systemic circuit oxygenated blood to the body

Answer 12

blood returning from the lungs flows through the pulmonary veins and into the left atrium. the atrium contracts forcing blood through the atria ventricular valve and into the left ventricle the ventricle contracts forcing blood through the semi lunar valve and into the aorta blood flows the throughout the body