Anatomy of the HeartSalt Lake Community College

Human Anatomy Laboratory

20-1

Objectives• Review blood histology• Review cardiac muscle histology• Identify layers of the heart wall• Review the location of the heart within the thoracic cavity• Identify structures in gross anatomy of the heart• Identify vessels involved in coronary circulation

20-2

Figure 20–1

Organization of the Cardiovascular System

Cardiac Muscle Histology

20-4

Blood Cells

20-5

Heart

Figure 20–2a

Between 2 pleural cavities in the mediastinum

• Located directly behind sternum

HEART

The real thing in ventral view.

Lungs have been removed.

20-8

Pericardium

20-9

Heart Wall

Specific Heart Anatomy

Anterior View

20-11

External Anatomy

Coronary Circulation

Figure 18.7a

Figure 20–6a

Walls of the ventricles:Left wall is thicker!

20-15

Heart Valves

• Atrioventricular– Tricuspid– Bicuspid or mitral

• Semilunar– Aortic– Pulmonary

• Prevent blood from flowing back

20-16

Heart Valves