Biology 449 - Animal Physiology October 13, 2008

Lecture 19 - Cardiovascular Physiology I

Overview of cardiovascular system

General features

Heart

Blood vessels

General structure

Plan and major vessels

Heart

Electrical events of the heartbeat

Mechanical events of the heartbeat

Cardiac output

Control of cardiac output

Terms to Know

Heart
Atrium (pl. atria)
Ventricle

Pulmonary circulation
Systemic circulation

Artery
Arteriole
Capillary
Venule
Vein

Pulsatile flow

Endothelium
One-way valve

Myocardium
Intercalated disk

Atrioventricular valves
[bicuspid, tricuspid]
Semilunar valves
Aortic valve
Pulmonary valve

Myogenic pacemaker
Sino-atrial (SA) node
Atrio-ventricular (AV) node
Bundle of His
Purkinje fibers

Systole
Diastole

Heart rate
Stroke volume
Cardiac output

Starling's Law of the Heart

Readings

Lectures 19-21: Chapter 9, pages 359-365, 372-386, 399-402