Biology 2601A/B Lecture Notes - Lecture 12: Gunther Von Hagens, Arteriole, Insect Flight
26 Oct 2013
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Document Summary
Circulatory system is made up of: fluid, vessels. Galen first looked at circulatory systems and described it. Al-nafis countered the argument by galen, saying that the flow through the circulatory system was: pump(s) unidirectional clear separation between left and right ventricles. Harvey extensive work about quantifying blood flow and volumes. Circulatory system is a closed system the blood does not leave the confines of the vascular system. Heart independently contracts and pushes the blood around hydraulic system = puts tremendous pressure on the fluid and sends it around. When the blood leaves the hear, its under high blood pressure. Pressure: 12 kpa (90 mmhg) arteries, 4. 4 kpa (33 mmhg) arterioles. Drop in pressure reflects energy loss in the system when entering capillaries: 2 kpa (15 mmhg) capillaries. Velocity: 48 cm/s arteries, 10 cm/s arterioles, 1 cm/s capillaries. Total cross sectional area: 500 cm2 arteries, 2000 cm2 arterioles, 5000 cm2 capillaries.
