Cardiovascular System

Question 1

size of heart

Answer 1

size of a fist

Question 2

how many chambers does the heart have?

Answer 2

4

Question 3

location of heart

Answer 3

mediastinum in the center of the chest cavity but more on the left side of chest

Question 4

endocardium

Answer 4

inner layer of heart that is smooth and thin which reduces friction as blood passes through

Question 5

myocardium

Answer 5

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

Question 6

pericardium

Answer 6

double-layered pleural sac

Question 7

Atria

Answer 7

receiving chambers- blood returns to the heart via veins first collects in the atria

Question 8

ventricles

Answer 8

pumping chambers-much thicker myocardium and their contraction ejects blood out of the heart and into great arteries

Question 9

(AV) tricuspid valve

Answer 9

controls opening between the right atrium and right ventricle

Question 10

apex

Answer 10

tip of edge at lower edge

Question 11

pulmonary valve

Answer 11

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

Question 12

mitral valve

Answer 12

2 cusps- blood flows through this atrioventricular valve to the left ventricle and can’t go back up the left atrium

Question 13

aortic valve

Answer 13

blood leaves the left ventricle through this valve and cannot return to the left ventricle

Question 14

arteries

Answer 14

vessels that carry blood away from the heart

Question 15

blood vessels

Answer 15

smooth,as blood flows through them, it experiences some friction and resistance

Question 16

pulmonary circulation

Answer 16

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

Question 17

veins

Answer 17

vessels that bring blood back to the heart