01:146:356 Chapter Notes - Chapter 15: Perfusion, Epithelium, Heart Failure

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Chapter 15: blood flow and the control of blood pressure: the blood vessels. Vasovagal syncope is the condition of fainting where blood pressure decreases and a patient faints due to lack of oxygen distribution. Blood leaving left heart enters systemic arteries and the contraction pressure is forced into the walls of the arteries; the release of this pressure is caused by elastic recoil: arteries are pressure reservoirs. Arterioles are high r outlet for arterial blood flow direct distribution by selectively constricting and dilating through variable resistance. Distal end of capillaries is where blood flows into venous side of circulation. Veins act as volume reservoir from which blood can be sent to arterial side if bp falls; from the veins, blood flows back to heart. Endothelium is the inner lining of all blood vessels that secrete paracrine and regulate bp, blood vessel growth, and material absorption: endothelium and adjacent elastic connective tissue make up the tunica intima.

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