bloodvessel1

bloodvessel1 - CHAPTER 18 BLOOD VESSELS 1. Describe the...

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CHAPTER 18 BLOOD VESSELS 1. Describe the anatomy and functional roles of the different types of blood vessels 2. Identify the pattern of blood circulation throughout the body, including systemic, pulmonary and coronary circulations 3. Explain blood pressure and its functional interrelationships with cardiac output, peripheral resistance, and hemodynamics. 4.Describe short term and long term blood pressure regulation.
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Cross section of an artery, vein and nerve Look carefully at the difference in structure of the artery and vein?
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Typical Layers in Arteries and Veins Figure 18.1b LUMEN Tunica externa Tunica media Tunica interna What about a capillary…. .
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Layers of blood vessel walls Tunica interna Endothelial layer that lines the lumen of all vessels With underlying layer of connective tissue with elastic fibers Provides slick surface to minimize friction Tunica media Smooth muscle in a framework of loose connective tissue Collagen fibers bind this layer with the inner and outer layers This layer is the thickest in arteries Function: ?? Tunica externa Layer of fibrous connective tissue, which adds strength and support to the vessel Larger vessels contain vasa vasorum – nourish more external tissues This layer is generally the thickest in veins.
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Qualities of Arteries Elasticity- Contractility- What happens when elasticity of the arteries fails?
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Arterial System Elastic arteries Large vessels to transport blood to major regions of the body Tunica media: lots of elastic fibers Expand/Contract to smooth out pressure fluctuations Muscular arteries Distribute blood through the muscles/organs Tunica media: More smooth muscle than elastic arteries Arterioles Regulate the amount of blood flowing to particular capillary beds
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bloodvessel1 - CHAPTER 18 BLOOD VESSELS 1. Describe the...

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