Test 2 Lecture 2: Heart and Great Vessels

Question 1

What is the sinus venarum and where is it derived from

Answer 1

Sinus Venarum is smooth thin walled posterior part of the right atrium derived from embryonic sinus Venosues. It recieves the superior vena cava and coronary sinus

Question 2

What it the part with Pectinate Muscles

Answer 2

The muscle part of the Right atrium dervied from SInus Venarum by Crista Terminales

Question 3

Interatrial Septum

Answer 3

Divides the Right atrium from the Left Atrium

Question 4

Remanant of fetal foramen ovale and valve

Answer 4

Fossa Ovalis

Question 5

Atrial Septal Defect

Answer 5

If the hole in interatrial septum is too large it allows the O2 blood to be shunted to the right atrium overloading the pulmonary system. Right atrium, rigiht ventricle and pulmonary trunk become enlarged

Question 6

How does right ventricle recieve blood through right atrium

Answer 6

Through atrioventricular orfice

Question 7

Another name for tricuspid valve

Answer 7

Right atrioventricular valve. Prevents backflow from right ventricle to right atrium

Question 8

Muscle projections on floor of right ventricle

Answer 8

Trabecular carnae

Question 9

two parts of interventricular septum

Answer 9

Muscular

Membranous: Posteior and superior

Question 10

Conus arterioses

Answer 10

cone shaped pouch that leads to pulmonary trunk

Question 11

What guards the pulmonary trunk

Answer 11

semilunar valve called pulmonary valve

Question 12

Three valves of right atrioventricular valve

Answer 12

Anterior cusp posterior cusp and septal cusp. Also called tricuspid valve

Question 13

Cordinae tendnae

Answer 13

Connects tricuspid to papillary muscles

Question 14

What do pappilary muscles and cordine taondonae do

Answer 14

Prevent atrioventricular cusps from prolapsing into the atria

Question 15

how does left atrium receive oxygenated blood

Answer 15

pulmonary veins

Question 16

Surface of Left atrium

Answer 16

Smooth except for pectinate muscles in left auricle

Question 17

how does left ventricle receive blood from left atrium

Answer 17

left atrioventrcular orfice guarded by mitral valve ( left atrioventricular valve)

Question 18

Shape differences in ventricles

Answer 18

Right ventricle is crescent shaped left ventricle is conicle shaped

Question 19

Aortic Vavle

Answer 19

Semilunar valve guarding the aorta

Question 20

trabaculae carnae in left ventricle

Answer 20

Fewer than right ventricl

Question 21

Mitral Valve

Answer 21

Bicuspid: Anteior and Posteior cusp

Question 22

Papillary muscles in Left Ventricle

Answer 22

Anterior and Posterior connected by chorade tendinae

Question 23

What is the most diseased valve of heart

Answer 23

Mitral Valve

Question 24

Disease of Mitral Valve

Answer 24

Nodules form on the cusps resulting in turbulant flow. Proplapse can occur in 7% of females.

Question 25

Vegitative endocardities

Answer 25

Hemodynamics associated with vulvar prolapse can erode endothelial surface of the valve and predispose a patient to endocardial infections. transiet bacterias seed abnormal endothelial surfaces

Question 26

Pulmonary and Aortic Valves

Answer 26

Tricuspid semilunar valves. Three cup like cusps that prevent ackflow into ventricles. They dont have papillary muscles or chordae tendons

Question 27

Structure of tricuspid aortic and pulmonary valve

Answer 27

fibrous nodule at midpoit of its free edges. Thin connective tissue area on either side called lunule. When valves close nodules and lunule meet in the middle

Question 28

Where do the coronory arteris arise

Answer 28

aortic sinuses

Question 29

What do coronary arteris supply

Answer 29

Myocardium and Epicardium