The Heart Basics

Systemic circulation

• Starts in the left atrium

• Starts in right atrium

• Ends in left atrium

• Ends in the right atrium

Pulmonary arteries carry _______ blood

• oxygenated

• deoxygenated

The pericardial sac is made up of

• epicardium

• fibrous pericardium

• parietal layer

• visceral layer

• serous fluid

Properties of myocardial cells

• short, branching cells

• primarily anaerobic

• can use fatty acids, glucose, lactic acid, AA, and ketone bodies

• 2-3 nuclei

Semilunar valves connect the

• right atria and right ventricle

• left ventricle and aorta

• left atrium and aorta

• right ventricle and pulmonary trunk

Functions of fibrous layer

• enables heart to beat with greater contractility

• insulates electrical activity

• attaches bases of arterial trunks to diaphragm

• prevent heart from overfilling

Fibrous skeleton

• loose connective tissue

• provides supportive rings to anchor heart valves

• prevents propagation of electrical signals from atria to ventricles

• structural boundary between atria and ventricles

The coronary sinus collects ________ blood from the coronary _______

• deoxygenated, veins

• deoxygenated, arteries

• oxygenated, veins

• oxygenated, arteries

Terminates in capillary beds to deliver oxygen to tissues

• end artery

• arterial anastomosis

• terminating veins

Connected arteries that provide two means of providing oxygen to a body tissue

• perfusing squishy thing

• coronary sinus

• functional end arteries

• arterial anastomosis