Biol129_C5 - Organ Systems Mammalian Organ Systems Organs...

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1 Organ Systems Mammalian Organ Systems • Organs and related tissues can be divided into systems. • Systems are not independent of each other – Ex. The muscular system need both the cardiovascular and nervous systems, as well as the skeletal system • Systems can consist of diverse tissues separated by some distance
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2 Cardiovascular System • Composed of the heart and vessels • There are two types of vessels – Arteries – carry blood from heart to body • High pressure, oxygenated blood • Vessels tend to be muscular – Veins – carry blood from body to heart • Low pressure, deoxygenated blood • Vessels have much less muscle Cardiovascular System - 2 • As vessels branch they become smaller – Arterioles and Venules • The smallest vessels are the capillaries – They are one cell thick • Generally speaking: – Arteries run deep – Veins run superficial
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3 Cardiovascular System - 3 • The heart provides for all of the circulation within the body • The heart breaks up the circulatory system into two major divisions: – Pulmonary –Sys tem ic Lymphatic System • A system of unidirectional vessels that serve to rid the body of excess extracellular
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Biol129_C5 - Organ Systems Mammalian Organ Systems Organs...

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