Lecture 2 - CardioVascular System

Question 1

Thoracic cavity (3)

Answer 1

Right/ Left lung

Heart (Mediastinum) which runs from T1-T12

Question 2

Pericardium (6)

Answer 2

Layer enclosing the heart
Double layer and fibrous layer

1 Fibrous connective tissue surrounds heart
2 Serous double membrane
Parietal lines inner surface
Visceral surrounds the heart - epicardium

Question 3

Coronary sinus (2)

Answer 3

Collection of veins joined together to form a large vessel that collects blood from the myocardium.
Delivers deoxygenated blood to RA

Question 4

What is the fossa ovalis

Answer 4

Foramen ovalis is the hole
Atrial septum
Septum primum

SP to AS pressure change fuses to form fossa ovalis which is a depression

Question 5

Blood vessels in the neck - arch of aorta (3)

Answer 5

Arch of aorta

1) left subclavian
2) left common carotid
3) brachioCephalic trunk
- right common Carotid
- right subclavian

Question 6

where do the jugular veins drain into

Answer 6

e - subclavian

i - brachiocephalic

Question 7

internal carotid supplys

Answer 7

post it

Question 8

external carotid supplys

Answer 8

post it

Question 9

on the RA 2

Answer 9

Rough muscle - musculi pectinati

smooth - ridge cristae terminalis

Question 10

RV 5

Answer 10

Rough - trabeculae carnea
smooth - infundibulum
blood pumped at a greater pressure
thicker than RA
RV--> Semilunar valve (3 cusps) --> Pulmonary arteries

Question 11

intraventricular septum

Answer 11

bulges into RV as BP is x6 higher in the LV

Question 12

MUSCLES OF THE HEART 3

Answer 12

NOTES

Question 13

What do papillary muscles do 3

Answer 13

found in V of H.
Attach to cups of AVV via chordae tendinea.
contract to prevent inversion/prolapse during VC or systole.

Question 14

Right coronary a 3

Answer 14

R CA

• if it supplies AV person is right branch dominant
• supplies blood to V, SAN,RA.
• Branches off from the anterior side of the aortic trunk which branches into the right atria ventricular branch and the right posterior descending intraventricular branch.

Question 15

Left coronary a 2

Answer 15

L CA

• supplies V and LA.
• Branch off from the posterior side of the aortic trunk and wraps around the pulmonary artery. Have a left anterior descending intraventricular branch, a left marginal branch and a left circumflex branch.

Question 16

cardiac veins 4

Answer 16

֍ The coronary sinus lays on the posterior side of the heart, just inferior to the pulmonary trunk. The coronary sinus then drains into the right atrium.
֍ The middle cardiac vein (posterior intraventricular vein) is on the posterior side of the heart between the ventricles, it drains into the coronary sinus.
֍ The great cardiac vein (anterior intraventricular vein) is on the anterior side of the heart between the ventricles.
Small cardiac vein runs between the right atrium and right ventricle.