Heart (2)

Question 1

Valves

Answer 1

TRICUSPID VALVE (right atrioventricular valve)
BICUSPID VALVE (left atrioventricular valve)
AORTIC SEMI-LUNAR VALVE
PULMONARY SEMI-LUNAR VALVE

• prevents backflow
• held in place by tough fibrous connective tissue

Question 2

Electrical Conduction

Answer 2

SA Node to AV Node to Ventricles

from AV node to ventricles - signals through AV bundle and purkinje fibres

-signals between nodes done by fibrous skeleton

Question 3

Coronary Arteries

Answer 3

• supply epicardium + myocardium

RIGHT CORONARY ARTERY

• right atrium
• right ventricle
• diaphragmatic side of left ventricle
• posterior 1/3 side of AV septum
• SA node
• AV node

LEFT CORONARY ARTERY

• left atrium
• left ventricle
• some of right ventricle
• IV septum (most)
• SA node
• AV node

Question 4

Venous Return

Answer 4

Great, Middle, Small cardiac veins
DRAINS into coronary sinus
DUMPS into right atrium