Chapter 11. Carry blood away from the heart Arteries Arterioles.
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Transcript of Chapter 11. Carry blood away from the heart Arteries Arterioles.
![Page 1: Chapter 11. Carry blood away from the heart Arteries Arterioles.](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e4c5503460f94b40e38/html5/thumbnails/1.jpg)
Cardiovascular SystemChapter 11
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Blood Vessels: The Vascular System• Carry blood away from the heart• Arteries• Arterioles
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Blood Vessels: The Vascular System• Exchanges between tissues and blood• Capillary beds
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Blood Vessels: The Vascular System• Return blood toward the heart• Venules• Veins
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Blood Vessels: The Vascular System
![Page 6: Chapter 11. Carry blood away from the heart Arteries Arterioles.](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e4c5503460f94b40e38/html5/thumbnails/6.jpg)
Blood Vessels: Microscopic Anatomy• Three layers (tunics)
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Blood Vessels: Microscopic Anatomy• Tunic intima• Endothelium
• Tunic media• Smooth muscle
• Tunic externa• Mostly fibrous connective tissue
![Page 8: Chapter 11. Carry blood away from the heart Arteries Arterioles.](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e4c5503460f94b40e38/html5/thumbnails/8.jpg)
![Page 9: Chapter 11. Carry blood away from the heart Arteries Arterioles.](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e4c5503460f94b40e38/html5/thumbnails/9.jpg)
Differences Between Blood Vessels• Walls of arteries are the thickest• Lumens of veins are larger• Larger veins have valves to prevent backflow• Walls of capillaries are only one cell layer thick
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![Page 11: Chapter 11. Carry blood away from the heart Arteries Arterioles.](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e4c5503460f94b40e38/html5/thumbnails/11.jpg)
Movement of Blood • Most arterial blood is pumped
by the heart
• Veins use the “milking” action of muscles to help move blood
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Capillary Beds• Two types of vessels• Vascular shunt—vessel directly connecting an arteriole to
a venule• True capillaries—exchange vessels
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Capillary Beds
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Capillary Beds