Heart

Question 1

It is a muscular organ that is
essential for life because it
pumps blood through the
body.

Answer 1

Heart

Question 2

FUNCTION OF THE
HEART

Answer 2

• generating blood pressure
• routing blood
• ensuring one-way blood flow
• regulating blood supply

Question 3

size of a heart

Answer 3

approximately the size of a closed fist

Question 4

form of the heart

Answer 4

shaped like a blunt cone

Question 5

located in the thoracic cavity between the two pleural cavities that surround the lungs.

Answer 5

heart

Question 6

Located superiorly at the base of the heart

Answer 6

right and left atria

Question 7

Extend from the base of the heart toward inferiorly at the apex of the heart

Answer 7

right and left ventricles

Question 8

Extends around the heart, separating the atria from the ventricles

Answer 8

coronary sulcus

Question 9

Originated from the right ventricle and carry blood to the lungs.

Answer 9

pulmonary trunk

Question 10

Originated from the left ventricle, carries blood to the rest of the body

Answer 10

aorta

Question 11

Receives blood from the veins

Answer 11

right and left atria

Question 12

It ensures one-way blood flow

Answer 12

heart valve

Question 13

Located between each atrium
and ventricle

Answer 13

Atrioventricular valves (AV)

Question 14

Located between each
ventricle and its associated
great artery

Answer 14

Semilunar valves

Question 15

Originate from the base of the
aorta, just above the aortic
semilunar valves.

Answer 15

coronary arteries

Question 16

Supply blood to the wall of the
heart

Answer 16

coronary arteries

Question 17

Drains blood from the cardiac
muscle

Answer 17

cardiac veins

Question 18

Carry blood from the wall of the
heart back to the right atrium.

Answer 18

cardiac veins

Question 19

also called the visceral
pericardium

Answer 19

epicardium

Question 20

the thick, middle layer of the
heart

Answer 20

myocardium

Question 21

The smooth inner surface of the
heart chambers

consists of simple squamous
epithelium over a layer of
connective tissue.

allows blood to move easily
through the heart

Answer 21

endocardium

Question 22

The surfaces of the interior walls
of the ventricles that are
modified by ridges and columns
of cardiac muscle

Answer 22

Trabeculae carneae

Question 23

are elongated, branching cells that contain one, or occasionally two, centrally located nuclei that are organized into spiral bundles or sheets

Answer 23

cardiac muscles

Question 24

record of these electrical events

Answer 24

Electrocardiogram (ECG

Question 25

It results from depolarization of the atrial myocardium.

Answer 25

P wave

Question 26

It consists of three individual waves: the Q, R, and S waves

Answer 26

QRS Complex

Question 27

It represents repolarization of the ventricles.

Answer 27

T wave

Question 28

The beginning of the QRS complex precedes ventricular __________

Answer 28

contraction

Question 29

The beginning of the T wave precedes ventricular ______

Answer 29

relaxation

Question 30

Time between the beginning of the P wave and the beginning of the QRS complex

Answer 30

PQ interval

Question 31

Extends from the beginning of the QRS complex to the end of the T wave

Answer 31

QT Interval

Question 32

refers to the repetitive pumping process that begins with the onset of cardiac muscle contraction and ends with the beginning of the next contraction

Answer 32

cardiac cycle

Question 33

refers to contraction of the two atria.

Answer 33

atrial systole

Question 34

refers to relaxation of the two atria.

Answer 34

atrial diastole

Question 35

first heart sound; has a lower pitch than the second

Answer 35

LUBB

Question 36

second heart sound. Occurs at the beginning of ventricular diastole and results from closure of the semilunar valves

Answer 36

DUPP

Question 37

when a heart valve does not close completely.

Answer 37

incompetent valve

Question 38

abnormal heart sounds; usually a result of faulty valves

Answer 38

murmurs

Question 39

refers to regulation mechanisms contained within the heart itself

Answer 39

INTRINSIC REGULATION OF THE HEART

Question 40

refers to regulation mechanisms external to the heart, such as either nervous or chemical regulation

Answer 40

EXTRINSIC REGULATION OF THE HEART