ch34_lecture - Circulation Chapter 34 Circulatory System *...

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Circulation Chapter 34
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Circulatory System * Accepts oxygen, nutrients, and other substances from the respiratory and digestive systems and delivers them to cells Accepts carbon dioxide and wastes from cells and delivers them to respiratory and urinary systems for disposal
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Functional Connections * food, water intake oxygen intake DIGESTIVE SYSTEM RESPIRATORY SYSTEM elimination of carbon dioxide nutrients, water, salts oxygen carbon dioxide CIRCULATORY SYSTEM URINARY SYSTEM water, solutes elimination of food residues rapid transport to and from all living cells elimination of excess water, salts, wastes
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Circulatory Systems * spaces or cavities in body tissues aorta heart pump pump Open System Closed System
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Vertebrate Systems * Fish Two-chamber heart pumps blood through one circuit Amphibians Heart pumps blood through two partially separate circuits Birds and mammals Four-chamber heart pumps blood through two entirely separate circuits
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Functions of Blood * Transports oxygen and nutrients to cells Carries carbon dioxide and wastes away from cells Helps stabilize internal pH Carries infection-fighting cells Helps equalize temperature
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Blood Volume and * Composition Plasma 50-60 percent of volume Water, plasma proteins, dissolved ions and molecules Cellular portion 40-50 percent of volume Red cells, white cells, and platelets
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Erythrocytes (Red Cells) * Most numerous cells in the blood Transport oxygen and carbon dioxide Colored red by oxygen-binding pigment (hemoglobin) Have no nucleus when mature
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This note was uploaded on 04/23/2011 for the course BIO 101 taught by Professor Nchowdhury during the Spring '11 term at BRAC University.

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ch34_lecture - Circulation Chapter 34 Circulatory System *...

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