Lecture 10

Question 1

know the pathway of the heart

Question 2

layers of the heart outer to inner

Answer 2

pericardium, pericardial cavity, epicardium, myocardium, endocardium

Question 3

pericardium

Answer 3

At the vessels,
epicardium reflects back,
forming the parietal layer of
pericardium.

Question 4

endocardium

Answer 4

endothelium & subendothelium CT - continue
into vessels, a deeper layer of CT, subendocardial layer binds to
myocardium (this where Purkinje fibers are found)

Question 5

myocardium

Answer 5

cardiac
muscle, thicker in
ventricles than in atria

Question 6

epicardium

Answer 6

(aka: visceral layer of serous pericardium):
single layer of mesothelium on exposed surface, CT and
adipose underneath. Surface is smooth, moist, slippery

Question 7

impulse conducting system

Answer 7

Impulse Conducting System:
Purkinje fibers, modified cardiac
muscle fibers

Question 8

Sino-atrial (SA) node

Answer 8

junction
superior vena cava and rt.
Atrium

Question 9

Atrio-ventricular (AV) node

Answer 9

medial wall right atrium

Question 10

Answer 10

sa node cell

Question 11

purpose of valves

Answer 11

Prevent backflow of blood; aid in moving
blood toward heart, a fold of T. interna, Well represented in limbs, usually in pairs

Question 12

go over sheep heart