The Circulatory System

Question 1

Erythrocytes

Answer 1

Red blood cells

Question 2

Leucocytes

Answer 2

White blood cells

Question 3

Plasma

Answer 3

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

Question 4

Red blood cells

Answer 4

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

Question 5

Haemoglobin

Answer 5

The red pigment in red blood cells that carries oxygen.

Question 6

Oxyhaemoglobin

Answer 6

Haemoglobin with oxygen molecules attached.

Question 7

White blood cells

Answer 7

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

Question 8

Platelets

Answer 8

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

Question 9

Circulatory system

Answer 9

The body system that circulates oxygen in blood to all the cells of the body. The circulatory system consisted of the heart, the blood vessels and blood.

Question 10

Arteries

Answer 10

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

Question 11

Veins

Answer 11

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

Question 12

Capillaries

Answer 12

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

Question 13

Oxygenated blood

Answer 13

Describes the bright red blood that has been supplied with oxygen in the lungs.

Question 14

Deoxygenated blood

Answer 14

Describes blood from which some oxygen has been removed.

Question 15

Vena cava

Answer 15

Large vein leading into the top right chamber of the heart.

Question 16

Process of circulatory system

Answer 16

Vena Cava, Right atrium, right ventricle, pulmonary arteries, lungs, pulmonary veins, left atrium, left ventricle, aorta, body, and so on.

Question 17

Left atrium

Answer 17

Upper left section of the heart where oxygenated blood from the lungs enter the heart via the pulmonary veins.

Question 18

Right atrium

Answer 18

Upper right section where deoxygenated blood from the body enters the heart via the vena cava.

Question 19

Left ventricle

Answer 19

Lower left section of the heart which pumps oxygenated blood to all parts of the body through the aorta.

Question 20

Right ventricle

Answer 20

Lower right section of the heart, which pumps deoxygenated blood to the lungs through pulmonary arteries.

Question 21

Valves

Answer 21

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 22

The sound made by the heart valves as they close

Answer 22

‘Lub Dub’

Question 23

Blood pressure

Answer 23

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

Question 24

Systolic pressure

Answer 24

The higher blood pressure reading during contraction of the heart muscles.

Question 25

Diastolic pressure

Answer 25

The lower blood pressure reading during relaxation of the heart muscles.

Question 26

Heartbeat

Answer 26

Contraction of the heart muscle occurring about 60-100 times per minute.

Question 27

Pulse

Answer 27

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

Question 28

Pacemaker

Answer 28

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

Question 29

Cardiac muscle

Answer 29

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