Lab Quiz 3 - Heart

Question 1

directed inferior and slightly to the left in the mediastinum

Answer 1

apex of the heart

Question 2

lies on the superior surface and is the exit and entrance of the great vessels

Answer 2

base of the heart

Question 3

outermost layer composed of thick, dense CT attached to the central tendon of the diaphragm

Answer 3

fibrous pericardium

Question 4

layers of the serous pericardium

Answer 4

parietal and visceral layer

Question 5

where do the coronary veins empty into

Answer 5

coronary sinus

Question 6

artery that serves the lateral wall of left ventricle

Answer 6

left circumflex artery

Question 7

artery that serves the anterior surface of the ventricles; also known as the “widow maker”

Answer 7

anterior interventricular artery (clinically Left Anterior Descending Artery)

Question 8

supplies the anterior ventricles and lateral/dorsal walls

Answer 8

left coronary artery

Question 9

branches of the left coronary artery

Answer 9

LAD
left circumflex

Question 10

• exits right ventricle and is anterior to aorta
• splits into R/L pulmonary arteries to the lungs

Answer 10

pulmonary trunk

Question 11

branches of the right coronary artery

Answer 11

marginal
posterior interventricular (posterior inferior descendng)

Question 12

coronary veins

Answer 12

great cardiac
middle cardiac
small cardiac

Question 13

intermediate layer lines the inside of the fibrous pericardium

Answer 13

parietal pericardium

Question 14

innermost layer closely applied to the heart muscle, aka the epicardium

Answer 14

visceral pericardium

Question 15

inflammation of the pericardium

Answer 15

pericarditis

Question 16

also known as the visceral pericardium, made up of connective and epithelial tissue

Answer 16

epicardium

Question 17

thick muscular walls made up of cardiac muscle cells

Answer 17

myocardium

Question 18

a delicate layer of epithelial cells that line the inside of the heart and are continuous with the lining of the blood vessels (endothelium)

Answer 18

endocardium

Question 19

contains openings for the IVC, SVC, coronary sinus, and empties into the RV

Answer 19

right atrium

Question 20

contains openings for pulmonary veins, empties into LV

Answer 20

left atrium

Question 21

pumps blood to lungs

Answer 21

right ventricle

Question 22

more muscular, pumps blood into systemic circulation

Answer 22

left ventricle

Question 23

prevent backflow into the atria when the ventricles are contracting

Answer 23

atrioventricular valves (AV)

Question 24

located betweent the left atrium and ventricle, consists of two flaps of endocardium

Answer 24

mitral (bicuspid)

Question 25

located between the right atrium and ventricle, consists of three flaps of endocardium

Answer 25

tricuspid valve

Question 26

collagen like cords that anchor the cusps to the ventricular walls

Answer 26

chordae tendinae

Question 27

small bundles of cardiac muscle that give rise to the chordae tendinae, arise from ventricular wall

Answer 27

papillary muscles

Question 28

composed of 3 pocket-like cusps, whcih are flattened against the arterial wall during contraction

Answer 28

semilunar valves

Question 29

located between the RV and pulmonary trunk

Answer 29

pulmonary semilunar valve

Question 30

located between the LV and aorta

Answer 30

aortic semilunar vavle

Question 31

# true or false: there should never be a time when any chamber of the heart is empty

Answer 31

true

Question 32

* exits LV and ascends to create the aortic arch

Answer 32

aorta

Question 33

3 branches of aortic arch

Answer 33

* brachiocephalic * left common carotid * left subclavian

Question 34

a fetal shunt vessel, now connective tissue between aorta and pulmonary trunk

Answer 34

ligamentum arteriosum

Question 35

confluence of cardiac veins

Answer 35

coronary sinus

Question 36

empties into the right atrium

Answer 36

superior vena cava, inferior vena cava

Question 37

empty into left atrium from lungs

Answer 37

pulmonary veins

Question 38

carry blood to the lungs from the right ventricle

Answer 38

pulmonary arteries

Question 39

artery that supplies the lateral side of the right ventricle

Answer 39

marginal artery

Question 40

artery that supplies the posterior surface of the ventricles

Answer 40

posterior interventricular artery (posterior inferior descending artery)