circulatory System

Question 1

blood

Answer 1

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 2

Vessels

Answer 2

a tubular structure carrying blood through the tissues and organs; a vein, artery, or capillary.

Question 3

Heart

Answer 3

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

Question 4

deoxygenated

Answer 4

remove oxygen from the blood

Question 5

oxygenated

Answer 5

supplied, treated, or enriched blood with oxygen.

Question 6

cardiovascular

Answer 6

relating to the heart and blood vessels.

Question 7

erythrocytes

Answer 7

red blood cells

Question 8

leucocytes

Answer 8

white blood cells

Question 9

plasma

Answer 9

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

Question 10

haemoglobin

Answer 10

the red pigment in red blood cells that carries oxygen

Question 11

platelets

Answer 11

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

Question 12

circulatory system

Answer 12

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

Question 13

capillaries

Answer 13

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

Question 14

arteries

Answer 14

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

Question 15

veins

Answer 15

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

Question 16

vena cava

Answer 16

large vein leading into the top right chamber of the heart

Question 17

left atrium

Answer 17

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

Question 18

right atrium

Answer 18

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

Question 19

valves

Answer 19

: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 20

systolic pressure: the higher blood pressure reading during contraction of the heart muscles

Answer 20

the higher blood pressure reading during contraction of the heart muscles

Question 21

heartbeat

Answer 21

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

Question 22

pulse

Answer 22

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