The Heart (Cardiovascular)

Topics: Heart / Pages: 31 (7729 words) / Published: May 2nd, 2013
20
The Heart

PowerPoint® Lecture Presentations prepared by Jason LaPres
Lone Star College—North Harris

© 2012 Pearson Education, Inc.

An Introduction to the Cardiovascular System
• Learning Outcomes
• 20-1 Describe the anatomy of the heart, including vascular supply and pericardium structure, and trace the flow of blood through the heart, identifying the major blood vessels, chambers, and heart valves. • 20-2 Explain the events of an action potential in cardiac muscle, indicate the importance of calcium ions to the contractile process, describe the conducting system of the heart, and identify the electrical events associated with a normal electrocardiogram.
© 2012 Pearson Education, Inc.

An Introduction to the Cardiovascular System
• Learning Outcomes
• 20-3 Explain the events of the cardiac cycle, including atrial and ventricular systole and diastole, and relate the heart sounds to specific events in the cycle.
• 20-4 Define cardiac output, describe the factors that influence heart rate and stroke volume, and explain how adjustments in stroke volume and cardiac output are coordinated at different levels of physical activity.

© 2012 Pearson Education, Inc.

An Introduction to the Cardiovascular System
• The Pulmonary Circuit
• Carries blood to and from gas exchange surfaces of

lungs

• The Systemic Circuit
• Carries blood to and from the body • Blood alternates between pulmonary circuit and systemic circuit

© 2012 Pearson Education, Inc.

An Introduction to the Cardiovascular System
• Three Types of Blood Vessels
1. Arteries
• Carry blood away from heart

2. Veins
• Carry blood to heart

3. Capillaries
• Networks between arteries and veins

© 2012 Pearson Education, Inc.

An Introduction to the Cardiovascular System
• Capillaries
• Also called exchange vessels

• Exchange materials between blood and tissues
• Materials include dissolved gases, nutrients,

waste products

© 2012 Pearson Education, Inc.

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