Circulartory System

Question 1

Blood

Answer 1

the red liquid that circulates around the body. It is made up of plasma, blood cells and platelets.

Question 2

Plasma

Answer 2

the yellowish, liquid part of blood that contains water, minerals, food and wastes from cells

Question 3

Red Blood Cells

Answer 3

living cells in the blood that transport oxygen to all other living cells in the body

Question 4

Haemoglobin

Answer 4

the red pigment in red blood cells that carries oxygen

Question 5

White Blood Cells

Answer 5

living cells that fight bacteria and viruses as part of the human body’s immune system

Question 6

Platelets

Answer 6

small bodies involved in blood clotting. They are responsible for healing by clumping together around a wound.

Question 7

Artery

Answer 7

hollow tubes (vessels) with thick walls carrying blood pumped from the heart to other body parts

Question 8

Veins

Answer 8

blood vessels that carry blood back to the heart. They have valves and thinner walls than arteries.

Question 9

Capillaries

Answer 9

minute tubes carrying blood to body cells. Every cell of the body is supplied with blood through capillaries.

Question 10

Oxygenated blood

Answer 10

a gas in the air (and water) that animals need to breathe in; made up of particles with two oxygen atoms. Plants produce oxygen as part of photosynthesis

Question 11

Deoxygenated blood

Answer 11

describes blood from which some oxygen has been removed

Question 12

Vena Cava

Answer 12

large vein leading into the top right chamber of the heart

Question 13

Left atrium

Answer 13

upper left section of the heart where oxygenated blood from the lungs enters the heart

Question 14

Blood Presure

Answer 14

measures how strongly the blood is pumped through the body’s main arteries

Question 15

Right Atrium

Answer 15

upper right section of the heart where deoxygenated blood from the body enters

Question 16

Left Ventricle

Answer 16

lower left section of the heart, which pumps oxygenated blood to all parts of the body

Question 17

Right Ventricle

Answer 17

lower right section of the heart, which pumps deoxygenated blood to the lungs

Question 18

Valves

Answer 18

flap-like folds in the lining of a blood vessel or other hollow organ that allow a liquid, such as blood, to flow in one direction only

Question 19

Heartbeat

Answer 19

contraction of the heart muscle occurring about 60–100 times per minute

Question 20

Pacemaker

Answer 20

electronic device inserted in the chest to keep the heart beating regularly at the correct rate. It works by stimulating the heart with tiny electrical impulses.

Question 21

Pulse

Answer 21

alternating contraction and expansion of arteries due to the pumping of blood by the heart

Question 22

Cardiac Muscle

Answer 22

special kind of muscle in the heart that never tires. It is involved in pumping blood through the heart.