Heart

Question 0

Epicardium

Answer 0

The parietal layer that reflects back to cover the external surface of the heart

Question 1

Where is the heart

Answer 1

In the Medial cavity of the thorax flanked laterally by the lungs, posterior to the sternum

Question 2

Apex

Answer 2

The pointed portion that extends slightly to the left side of body

Question 3

Base

Answer 3

Where the great vessels emerge, under second rib and towards right shoulder

Question 4

Myocardium

Answer 4

The walls of the heart made from cardiac muscle

Question 5

Right and left atrium (atria)

Answer 5

Receiving chambers for blood that’s entering the heart by the great veins

Question 6

Auricles

Answer 6

A small ear like extension in the atriums that increase it’s volume

Question 7

Right and left ventricles

Answer 7

Pumps that eject blood into the arteries and keep it flowing around the body (right goes to lungs & left returns to body)

Question 8

Endocardium

Answer 8

Thin serous endothelium that lines the inside of the ventricles
(Over the myocardium)

Question 9

Interatrial septum

Answer 9

The wall that seperates the Arita

Question 10

Inter-ventricular septum

Answer 10

The wall that separates the ventricles

Question 11

Strength of walls

Answer 11

Artial- not so strong, gravity flows the blood down

Right ventricle- moderately muscular, to lungs & left atrium

Left ventricle- 2-4 times thicker than the right, pumps blood through body

Question 12

Superior and inferior vena cava

Answer 12

Drops off oxygen poor blood into right atrium

Question 13

Pulmonary Veins

Answer 13

Four veins deliver oxygen rich blood to the left atrium from the lungs

Question 14

Pulmonary trunk

Answer 14

Routes the blood to the lungs to be oxygenated

Question 15

Aorta

Answer 15

Flows blood to the rest of the body

Question 16

Bicuspid valves

Answer 16

Two flaps of endocardium where blood passes through from left atrium

Question 17

Tricuspid valve

Answer 17

3 flaps of endocardium that flow from right atrium

Question 18

Atrioventricular valves

Answer 18

Pathways that lead from the atria to the ventricles

Question 19

Chordae tendineae

Answer 19

Cords connected to papillary muscles that hold the cusps down

Question 20

Papillary muscle

Answer 20

Prevent the AV valves from flipping open

Question 21

Diastole

Answer 21

When a chamber is relaxed

Question 22

Systole

Answer 22

When a chamber contracts

Question 23

Semilunar valves

Answer 23

Controls blood flow from ventricles to great arteries

Pulmonary- opens to right ventricle

Aortic- opens to left ventricle

Question 24

Brachiocelphalic artery

Answer 24

Right side of heart on top of aortic arch

Question 25

Ligamentum arteriosum

Answer 25

Connects aorta with left pulmonary artery

Question 26

Coronary arteries

Answer 26

Left- circumflex branch(blood to left atrium &left posterior ventricle wall)
Anterior ventricular branch(blood to ventricles)

Right- right marginal branch (blood to lateral sides of right atrium/ventricle)
Posterior interventricular branch (blood to posterior walls of ventricles and back portion of interventricular septum)

Question 27

Sinus rhythm

Answer 27

Normal heartbeat

Question 28

PVC (premature ventricular contraction)

Answer 28

drugs

Stimuli that causes the heart to contract before the SA Node

Question 29

Ectopic Focus

Answer 29

region of spontaneous firing (not SA node)

Question 30

Arrhythmia

Answer 30

Any abnormal cardiac rhythm

Question 31

Heart block

Answer 31

Failure of any part of the cardiac conduction system #BadSignal

Question 32

Pacemaker potential

Answer 32

A drift upward, gradual depolarization

Question 33

•Quiescent period

Answer 33

–all chambers relaxed

–AV valves open and blood flowing into ventricles

Question 34

•Cardiac Output

Answer 34

Heart Rate x Stroke Volume