A & P 314 Lab Exam 1 Quiz 2

intercalated disc

intercalated disc

structure

Gap junctions

Small cell to cell junctions, which allow for the cytoplasm of one cell to continuously flow into the cytoplasm of an adjacent cell

Cardiac muscle tissue

tissue type

Cardiomyocyte

Cell type

parietal pericardium

outer layer of the pericardial sac, E

visceral pericardium

inner layer of the pericardial sac, epicardium, C

epicardium

outer layer of the heart, visceral pericardium, C

endocardium

slippery inner lining of the heart, B

pericardial space

space between the two layers of the pericardial sac, D

pericardial fluid

lubrication in the pericardial space

myocardium

muscular layer between epi- and endocardium, A

apex

inferior portion of the heart that comes to a point, blue

base

superior margin of the heart, line drawn across the large blood vessels, purple

auricle

flap-like extensions of the atria that extend anteriorly and increase the amount of blood that the atria can hold, 2 and 51

Anterior Interventricular Sulcus

shallow indentations in the front of the heart between ventricles that is filled with adipose tissue and coronary blood vessels, 5

Posterior Interventricular Sulcus

shallow indentations in the back of the heart between ventricles that is filled with adipose tissue and coronary blood vessels

right atrium

first part of the heart that deoxygenated blood drains into from the Superior Vena Cava and Inferior Vena Cava, 1

Superior Vena Cava

drains deoxygenated blood from the top of the body into the right atrium, 11

Inferior Vena Cava

drains deoxygenated blood from the bottom of the body into the right atrium, 11

right atrioventricular valve

valve that deoxygenated blood flows through to get from the right atrium to the right ventricle, 2

Left Pulmonary Vein

drains oxygenated blood from the left lung into the left atrium, 6

Right Pulmonary Vein

drains oxygenated blood from the right lung into the left atrium, 6

left atrium

receives oxygenated blood from the lungs via the Left and Right Pulmonary Veins, 7

left atrioventricular valve

valve that oxygenated blood moves through when going from the left atrium and enters left ventricle, 41

aortic valve

valve that oxygenated blood flows through on its way out of the left ventricle, 9

right ventricle

pumps deoxygenated blood to the lungs via the pulmonary trunk, 4

pulmonary valve

valve that deoxygenated blood goes through to enter into the pulmonary trunk from the right ventricle, 3

pulmonary trunk

artery that transports deoxygenated blood away from the right ventricle to the lungs, splits in the Left Pulmonary Artery and the Right Pulmonary Artery, 4

Left Pulmonary Artery

takes deoxygenated blood away from the right ventricle to the left lung, 5

Right Pulmonary Artery

takes deoxygenated blood away from the right ventricle to the right lung, 5

left ventricle

pumps oxygenated blood to the body via the aorta, 6

aorta

artery carrying oxygenated blood from the left ventricle, 10

ascending aorta

transports oxygenated blood superiorly, 11

aortic arch

portion of the aorta that curves over the superior margin of the heart, 12

descending aorta

transports oxygenated blood inferiorly, 19

chordae tendineae

hold atrioventricular valves in place by extending downward into either ventricle and anchoring into papillary muscles

papillary muscles

small extensions of tissue that hold chordae tendinea into place, 40, 42, 62

interatrial septum

separates the atria

interventricular septum

separates the ventricles

right coronary artery

first branch off the aorta to the right to supply the heart with blood, splits into two branches, 31

right marginal artery

supplies the anterior of the right ventricle, branch off the right coronary artery, 63

posterior interventricular artery

supplies the posterior of the left and right ventricle, branch off the right coronary artery, 61

left coronary artery

first branch off the aorta to the left supply the heart with blood, splits into two branches, 29

anterior interventricular artery

mostly supplies the anterior of the left ventricle but does send some blood to the anterior of the right ventricle too, branch off the left coronary artery, 50

circumflex artery

wraps around the right margin of the heart, under the left auricle, and eventually merges with the posterior interventricular artery via small anastomoses, 49

Anastomoses

A small blood vessel, which allows blood to bypass a capillary bed

great cardiac vein

begins in the anterior interventricular sulcus and will follow the circumflex artery as it wraps around the left margin of the heart to merge with the coronary sinus, 28

coronary sinus

the convergence of all the major veins of the heart, and it will drain blood directly into the right atrium, 27

small cardiac vein

forms on the right margin of the heart (alongside the marginal artery) and will wrap around the right side of the heart to drain into the coronary sinus, 46

middle cardiac vein

forms in the posterior interventricular sulcus and drains directly into the coronary sinus, 60