Heart

Question 1

– cardiac muscle of the heart

Answer 1

myocardium

Question 2

blood essentially flows in – loops or circuits within the body

Answer 2

two

Question 3

– side of the heart receives deoxygenated blood from the body and pumps this blood to the lungs to be oxygenated

Answer 3

right

Question 4

right side is considered part of the – circuit

Answer 4

pulmonary

Question 5

– side of the heart receives oxygenated blood from the lungs and pumps it to the body

Answer 5

left

Question 6

left side is considered part of the – circuit

Answer 6

systemic

Question 7

a fluid-filled sac called – surrounds the entire heart

Answer 7

pericardium

Question 8

thick barricade between the two sides of the heart

Answer 8

septum

Question 9

atrium and ventricle is separated by

Answer 9

atrioventricular (AV) valves

Question 10

– is between the right atrium and right ventricle

Answer 10

tricuspid valve

Question 11

– is between the left atrium and left ventricle

Answer 11

bicuspid (mitral) valve

Question 12

– regulate the flow of blood out of the ventricles

Answer 12

semilunar valves

Question 13

– regulate blood leaving the right ventricle

Answer 13

pulmonary semilunar valve

Question 14

– regulate blood leaving left ventricle

Answer 14

aortic semilunar valve

Question 15

pulmonary circuit begins when veins within the body merge into the – which lie on the dorsal wall of the thoracic and abdominal cavities

Answer 15

venae cavae

Question 16

– venae cavae comes from the head and neck

Answer 16

superior

Question 17

– venae cave comes from the trunk and lower extremities

Answer 17

inferior

Question 18

venae cave carry – blood and merge into the right atrium of the heart

Answer 18

deoxygenated

Question 19

as the atrium –, blood with pass through the tricuspid valve into the right ventricle

Answer 19

contracts

Question 20

as the right ventricle contracts, blood passes through the – into the pulmonary arteries

Answer 20

pulmonary semilunar valve

Question 21

– carry blood to the lungs and are the only arteries that do not carry oxygenated blood

Answer 21

pulmonary arteries

Question 22

after gas exchange, – carry the oxygenated blood toward the left side to the heart into the systemic circuit

Answer 22

pulmonary veins

Question 23

pulmonary veins are the only veins that carry – blood

Answer 23

oxygenated

Question 24

blood reenters the heart through the –

Answer 24

left atrium

Question 25

As the left atrium contracts (in sync with right atrium contraction), blood is pushed through the -- into the left ventricles

Answer 25

bicuspid valve

Question 26

when left ventricle contracts (in sync with right ventricle), blood is pushed into the aorta via the --

Answer 26

aortic semilunar valve

Question 27

largest artery which runs along the dorsal wall of the body next to the inferior vena cava

Answer 27

aorta

Question 28

first branches off the aorta, --, which serve to provide circulation to the surface of the heart

Answer 28

coronary arteries

Question 29

blockage of the coronary arteries stop blood flow which is characteristic of a --

Answer 29

heart attack

Question 30

after blood flows through the coronary arteries, deoxygenated blood is returned to the right side of the heart via -

Answer 30

coronary veins

Question 31

cardiac muscle is -- as it has the ability to contract on its own without stimulation from the nervous system

Answer 31

involuntary

Question 32

the -- that generate heart contraction need to be spread through the conducting system of the heart

Answer 32

impulses

Question 33

-- aka pacemaker, is a bundle of conducting cells in the top of the right atrium that initiate contractions

Answer 33

sinoatrial (SA) node

Question 34

SA node sends -- through the two atria, causing them to contract

Answer 34

electrical impulses

Question 35

impulse sent from the SA node arrives at the -- where the impulse is delayed for a very short time

Answer 35

atrioventricular (AV) node

Question 36

delay at AV node ensures that all of the blood from the atria was moved to the ventricles and that the atria are -- when the ventricles contract

Answer 36

empty

Question 37

impulse is spread through the bundle of His and through -- in the walls of the ventricles, causing ventricular contraction

Answer 37

Purkinje fibers

Question 38

measure of the force of blood exerted on the walls of a blood vessel

Answer 38

blood pressure

Question 39

blood pressure is typically measured within the --, which have enough pressure to overcome the peripheral resistance of the arterioles and capillaries

Answer 39

arteries

Question 40

pressure exerted on arteries as the ventricles contract

Answer 40

systolic pressure

Question 41

measurement of pressure on the arteries during ventricular relaxation

Answer 41

diastolic pressure

Question 42

primary means of regulation of blood pressure is by regulation of -- through the kidneys

Answer 42

blood volume

Question 43

higher blood volume -->

Answer 43

higher blood pressure

Question 44

-- in humans consist of a four-chambered heart to pump blood and a series of vessels needed to transport blood in the body

Answer 44

cardiovascular system