Graphics are used with permission of:
Pearson Education Inc., publishing as Benjamin Cummings (http://www.aw-bc.com)
Page 1. Introduction
• The heart is the transport system pump; the delivery routes are the blood vessels. Using blood as the transport medium, the heart propels oxygen, nutrients, wastes, and other substances to and past the body cells.
Page 2. Goals
• To review the anatomy of the heart.
• To review the pulmonary and systemic circuits.
• To review the anatomy of cardiac muscle cells.
Page 3, 4 & 5. Anatomy Views
• Label the diagrams of the heart below:
Page 6. Pipes-Pump Analogy
• The heart consists of two side by side pumps. The blood vessels are the "pipes" that carry blood throughout the body. The right atrium and right ventricle pump oxygen-poor, CO2-rich blood to the lungs. In the lungs the blood receives oxygen, eliminates carbon dioxide, and travels back to the left atrium of the heart. From the left atrium the oxygen-rich, CO2poor blood is pumped out to the body by the left ventricle. When the body has depleted the blood's oxygen, the veins return the blood to the right side of the heart and the cycle continues.
Page 7. Circulation
• Oxygen-poor blood is pumped from the right side of the heart to the lungs. Here it receives oxygen and travels back to the heart. This pathway is the pulmonary circuit. The pathway for the systemic circuit includes the entire body as the left side of the heart pumps oxygen-rich blood out to the body's tissue and organs. After the bloods oxygen is depleted, it returns to the right side of the heart via the venous system.
• On the diagram below, color the oxygen-rich blood red and the oxygen-poor blood blue. Label the parts:
Page 8. Cardiac Histology
• Three features of the histology of cardiac muscle:
1. Nuclei
2. Intercalated Disks
3. Cardiac Myofibrils
Page 9. Cardiac Muscle Cells
• There are two kinds of cell junctions and the intercalated disks.