Pas 407 Heart Study Guide Graded A+

superior vena cava {Ans: drainage for head, thoracic cage, and upper appendages}cuspid valves {Ans: separate atria from ventricles; made of connective tissue flaps - tricuspid: 3 cusps on right side - bicuspid (mitral) valve - 2 cusps on left side cusps secured to ventricular chamber through cordae tendinae anchored to papillary muscles cusps act as parachute, containing blood during ventricular contraction - stretch/weakness in cordae tendinae/papillary muscles can result in valve prolapse (heart murmur); common on left side (mitral valve prolapse)}inferior vena cava {Ans: drainage for abdomen, pelvis, and lower appendages}semilunar valve {Ans: separate ventricles from great vessels (aorta/pulmonary trunk) each composed of 3 "pocket cusps" - flatten against wall as ventricles contract, allowing blood to flow into great vessels - fill with blood, bulge into lumen as ventricles relax, blood starts to back flow}Erb's point {Ans: aortic + pulmonary valve left 3rd intercostal space at left sternal border}endocarditis {Ans: inflammation of endocardium, particularily around the valves; correlates with IV drug use, tongue piercing; may result in permanent scarring, death}