Anatomy of the Heart Salt Lake Community College Human Anatomy Laboratory

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

Organization of the Cardiovascular System Figure 20–1

Cardiac Muscle Histology

Blood Cells

Heart Located directly behind sternum Between 2 pleural cavities in the mediastinum Figure 20–2a

HEART The real thing in ventral view. Lungs have been removed.

Pericardium

Heart Wall

Specific Heart Anatomy Anterior View

External Anatomy

Coronary Circulation Figure 18.7a

Figure 20–6a

Walls of the ventricles: Left wall is thicker!

Heart Valves Atrioventricular Semilunar Tricuspid Bicuspid or mitral Semilunar Aortic Pulmonary Prevent blood from flowing back

Heart Valves