cardiovascular system

Question 1

arteries

Answer 1

Vessels that carry blood away from the heart

Question 2

blood vessels

Answer 2

A tube through which the blood circulates in the body.

Question 3

capillaries

Answer 3

Tiny vessels that branch off from arteries to deliver blood to all body tissues

Question 4

deoxygenated

Answer 4

body → right chambers of the heart → lung

Question 5

oxygenated

Answer 5

lung → left chambers of the heart → body

Question 6

oxygen

Answer 6

The odorless gas that is present in the air and necessary to maintain life

Question 7

heart

Answer 7

receiving deoxygenated blood, recycling it through the lungs, and supplying oxygenated blood to the body

Question 8

pulmonary circulation

Answer 8

between the heart and lungs, transports deoxygenated blood to the lungs to get oxygen, and then back to the heart

Question 9

systemic circulation

Answer 9

carries oxygenated blood away from the heart to the tissues and cells, and then back to the heart

Question 10

veins

Answer 10

Vessels that bring blood back to the heart

Question 11

size of heart

Answer 11

size of a fist and shaped like an upside-down pear

Question 12

How many heart chambers

Answer 12

4

Question 13

location of heart

Answer 13

mediastinum in the left leaning center of the chest cavity

Question 14

apex

Answer 14

tip of the heart at the lower edge

Question 15

endocarium

Answer 15

inner layer of the heart lining the heart chambers. It is a very smooth, thin layer that serves to reduce friction as the blood passes through the heart chambers.

Question 16

myocardium

Answer 16

thick, muscular middle layer of the heart. Contraction of this muscle layer develops the pressure required to pump blood through the blood vessels.

Question 17

pericardium

Answer 17

Fluid between the two layers of the sac reduces friction as the heart beat

Question 18

atria

Answer 18

receiving chambers of the heart. Blood returning to the heart via veins first collects in the atria.

Question 19

ventricles

Answer 19

eject

Question 20

tricuspid valve

Answer 20

controls the opening between the right atrium and the right ventricle. Once the blood enters the right ventricle, it cannot go back up into the atrium again

Question 21

pulmonary valve

Answer 21

prevents blood that has been ejected into the pulmonary artery from returning to the right ventricle as it relaxes

Question 22

mitral valve

Answer 22

Blood flows through this atrioventricular valve to the left ventricle and cannot go back up into the left atrium.

Question 23

aortic valve

Answer 23

Blood leaves the left ventricle through this valve and cannot return to the left ventricle.