Heart

Question 1

Right side of heart receives ____ through ____

Answer 1

Poorly O2-blood through SVC & IVC

Question 2

Right side of heart pumps…

Answer 2

De-O2 blood through pulmonary trunk aa to lungs for O2

Question 3

Left side of heart receives ____ via ____ into ____

Answer 3

O2-blood
pulmonary vv —> L atrium

Question 4

Left side of heart pumps…

Answer 4

O2-blood into aorta and aa of body

Question 5

Chambers of the heart

Answer 5

• R & L atria = receiving chambers, pump blood into ventricles
• R & L ventricles = discharging chambers

Question 6

Layers of the heart

Answer 6

Epicardium
Myocardium
Endocardium

Question 7

Epicardium is formed by ____

Answer 7

Visceral serous pericardium

Question 8

Myocardium is composed of ____

Answer 8

Cardiac muscle

Question 9

Endocardium is composed of ____

Answer 9

Endothelium

Question 10

Location of Apex

Answer 10

• inferolateral part of left ventricle
• lies posterior to left 5th intercostal space

Question 11

Location of Base of the heart

Answer 11

• posterior aspect
• formed mainly by L atrium, faces bodies of T6-T9
• extends superiorly to bifurcation of pulmonary trunk & inferiorly to coronary sinus

Question 12

Base of heart receives ____ veins in…

Answer 12

• pulmonary veins
• L atrium, SVC, IVC, R atrium

Question 13

Anterior (intercostal) surface of heart is mainly formed by the ____

Answer 13

R ventricle

Question 14

Diaphragmatic (inferior) surface of heart is formed mainly by the ____

Answer 14

L ventricle
Related to central tendon of diaphragm

Question 15

Right coronary artery location

Answer 15

• Originates Superior to right cusp of aortic valve
• follows coronary sinus

Question 16

Left coronary artery location

Answer 16

Originates superior to left cusp of aortic valve

Question 17

Branches of right coronary artery

Answer 17

• SA nodal
• right marginal
• posterior interventricular

Question 18

Branches of left coronary artery

Answer 18

• left interventricular artery
• circumflex artery

Question 19

Veins of external surface of heart

Answer 19

• small, middle, great cardiac veins
• coronary sinus

Question 20

Openings of right atrium

Answer 20

• SVC
• IVC
• opening & valve of coronary sinus
• tricuspid orifice

Question 21

Great cardiac vein runs with the ____

Answer 21

Anterior interventricular artery

Question 22

Small cardiac vein runs with the ____

Answer 22

Right marginal artery

Question 23

Pectinate muscles

Answer 23

• Right atrium
• anterior muscular wall

Question 24

Crista terminalis

Answer 24

• R atrium
• separation of muscular & smooth portions of atrial wall

Question 25

Fossa ovalis

Answer 25

- Oval depression in interatrial septum - remnant of embryological oval foramen

Question 26

The conduction system of the heart consists of…

Answer 26

Sinoatrial (SA) node Atrioventricular (AV) node

Question 27

Sinoatrial node

Answer 27

- collection of cells in wall of R atrium (lateral to SVC) - produces action potential causing heart to contract

Question 28

Atrioventricular (AV) node

Answer 28

- connects atria & ventricles causing ventricles to contract through AV bundles - located in interatrial septum near opening for coronary sinus

Question 29

Chordae tendinae

Answer 29

Tendinous cords from papillary muscles attached to cusps

Question 30

Function of Papillary muscles

Answer 30

Contraction tightens chordae tendinae and cusps of valve together

Question 31

How many papillary muscles are in the right ventricle

Answer 31

3

Question 32

Right atrioventricular valve

Answer 32

Tricuspid

Question 33

Trabeculae carnae

Answer 33

- irregular muscular columns in heart wall in ventricles - pull on chordae tendinae - contraction of heart wall