Anatomy and Cell Biology 3319 Lecture : Anatomy Notes
1 May 2012
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The interventricular septum and wall are the same thing. A ventricular septal defect occurs when the superior part of the interventricular septum fails to form, leaving a hole between the two ventricles. Blood mixes between the two ventricles, and more blood moves from left to right because the left ventricle is stronger. This occurs in 1 in every 500 births. Transposition of great vessels: the aorta comes from the rv and the pulmonary trunk from the lv. It occurs when the bulbus cordis does not divide properly. Blood is never refreshed and it just keeps getting circulated around the body. Deoxygenated blood passes repeatedly around the systemic circuit, while oxygenated blood recycles around the pulmonary circuit. This occurs in 1 in every 1000 births. Coarctation of the aorta: a part of the aorta is narrowed or constricted, which causes blood flow to be reduced, and the work load on the lv to increase.
