PAT 20A/B Lecture Notes - Lecture 4: Combined Oral Contraceptive Pill, Aorta, Atherosclerosis
2 Nov 2017
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Schematic representation of blood flow through the heart. 1, the right atrium receives deoxygenated (venous) blood from the inferior and superior venae cavae and the coronary sinus. The blood then passes through the tricuspid valve into the right ventricle. 2, with each contraction, the right ventricle pumps blood through the pulmonic valve into the pulmonary artery and to the lungs. 3, oxygenated blood flows from the lungs to the left atrium by way of the pulmonary veins. 4, it then passes through the mitral valve and into the left ventricle. 5, as the heart contracts, blood is ejected through the aortic valve into the aorta and thus enters the systemic circulation. (lewis 844) Lewis, sharon l. medical-surgical nursing in canada, 3rd edition. Changes in blood pressure: bp falls, hr/co decreases, vasodilation, hr/co increases, vasoconstriction, discuss the etiology of ht. Htn can be classified etiologically as either primary or secondary.
