Cardiac Anatomy

Question 1

Components of Pericardium

Answer 1

Fibrous pericardium- A strong, dense collagenous tissue that blends with the tunica externa of the great vessels and the central tendon of the diaphragm.

Serous pericardium- Lines the inner surface of the fibrous pericardium.

Visceral pericardium (epicardium)- Serous layer follows the contours of the heart surface.

Question 2

thesbian veins

Answer 2

drain into each chamber of the heart,

drain mostly in the right atrium and least in the left ventricle

Question 3

fetus oxygenation

Answer 3

fetuses only receive 50% of oxygen from mother, but the fetal hemoglobin has a much better ability to grab oxygen

Question 4

intimal fibrous proliferation (will be on test)

Answer 4

thickening and clotting of coronary arteries causing CA to become diseased

Question 5

Coronary veins

Question 6

chordae tendinae

Question 7

layers of the heart - Myocardium

Answer 7

Muscular layer
Thickest in left ventricle
Creates force for ejection
Unique properties of:
Excitability
Conductivity
Contractility
Rhythmicity

Question 8

Endocardium

Answer 8

Innermost layer of heart
Lines chambers
Contains endothelial cells as well as conductive tissue

Question 9

pericardium

Question 10

Conduction system KNOW THIS

Answer 10

sa node goes to the AV node
communicates with Bachman’s bundle

internodal tract

sa node is pace maker

AV ventricular node –> contolled by internodal tract and posterior internodal tract

Question 11

gastrulation

Answer 11

Question 12

adult structure of the derivatives of the following embryonic structures

Answer 12

(1) Truncus arteriosus: aorta; pulmonary trunk
(2) Bulbus cordis: Smooth part of RV (conus arteriosus), and LV (aortic vestibule)(3) Primitive ventricle: trabeculated part of LV and RV

(4) Primitive atrium: Trabeculated part of RA and LA(
5) Left horn of sinus venosus: coronary sinus(
6) Right horn of sinus venosus: smooth part of RA(
7) Right common cardinal vein and right anterior cardinal vein: SVC