Cardiovascular system

Question 1

Cardiovascular

Answer 1

relating to the heart and blood vessels.

Question 2

Blood

Answer 2

the red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body.

Question 3

Vessels

Answer 3

the components of the circulatory system that transports blood throughout the human body

Question 4

heart

Answer 4

a hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation. In vertebrates there may be up to four chambers (as in humans), with two atria and two ventricles.

Question 5

deoxygenated

Answer 5

remove oxygen from.

Question 6

oxygenated

Answer 6

supplied, treated, or enriched with oxygen.

Question 7

erythrocytes

Answer 7

red blood cells

Question 8

leucocytes

Answer 8

white blood cells

Question 9

red blood cells

Answer 9

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

Question 10

haemoglobin

Answer 10

the red pigment in red blood cells that carries oxygen

Question 11

oxyhaemoglobin

Answer 11

haemoglobin with oxygen molecules attached

Question 12

white blood cells

Answer 12

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

Question 13

platelets

Answer 13

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

Question 14

circulatory system

Answer 14

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

Question 15

arteries

Answer 15

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

Question 16

veins

Answer 16

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

Question 17

capillaries

Answer 17

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

Question 18

oxygenated blood

Answer 18

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

Question 19

deoxygenated blood

Answer 19

describes blood from which some oxygen has been removed

Question 20

vena cava

Answer 20

large vein leading into the top right chamber of the heart

Question 21

left atrium

Answer 21

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

Question 22

right atrium

Answer 22

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

Question 23

left ventricle

Answer 23

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

Question 24

right ventricle

Answer 24

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

Question 25

valves

Answer 25

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 26

lub dub

Answer 26

the sound made by the heart valves as they close

Question 27

blood pressure

Answer 27

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

Question 28

systolic pressure

Answer 28

the higher blood pressure reading during contraction of the heart muscles

Question 29

diastolic pressure

Answer 29

the lower blood pressure reading during relaxation of the heart muscles

Question 30

heartbeat

Answer 30

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

Question 31

pulse

Answer 31

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

Question 32

pacemaker

Answer 32

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 33

cardiac muscle

Answer 33

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