Anatomy of the Anatomy of the HeartHeart

Salt Lake Community College Salt Lake Community College

Human Anatomy LaboratoryHuman Anatomy Laboratory

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ObjectivesObjectives• Review blood histologyReview blood histology

• Review cardiac muscle histologyReview cardiac muscle histology

• Identify layers of the heart wallIdentify layers of the heart wall

• Review the location of the heart within the Review the location of the heart within the thoracic cavitythoracic cavity

• Identify structures in gross anatomy of the Identify structures in gross anatomy of the heartheart

• Identify vessels involved in coronary Identify vessels involved in coronary circulationcirculation

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Figure 20–1

Organization Organization of the of the Cardiovascular Cardiovascular SystemSystem

Cardiac Muscle HistologyCardiac Muscle Histology

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Blood CellsBlood Cells

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HeartHeart• Located directly behind sternumLocated directly behind sternum

Figure 20–2a

Between pleural cavities in the mediastinum

HEART

Lungs have been removed.

PericardiumPericardium

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Heart WallHeart Wall

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Specific Heart AnatomySpecific Heart Anatomy

Anterior View

External AnatomyExternal Anatomy

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Coronary CirculationCoronary Circulation

Figure 18.7a

Figure 20–6a

Coronal section of the Coronal section of the heartheart

Walls of the ventricles:Left wall is thicker!

Heart ValvesHeart Valves

• Atrioventricular valvesAtrioventricular valves• TricuspidTricuspid

• Bicuspid or mitralBicuspid or mitral

• Semilunar valvesSemilunar valves• AorticAortic

• PulmonaryPulmonary

• Prevent blood from Prevent blood from flowing backflowing back

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Heart ValvesHeart Valves

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