Details Title: cardiovascular system Description: N/A Total Flash Cards: 21 Created: 05/17/2009 21:45:55		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Physiology Flashcards
Cards in this set: Term Pericardim Definition Encloses the heart.   Term Cardiovascular system Definition function: supplies oxygen and nutrients to tissues, removes waste.   includes: capillaries, veins, heart, vessels, and arteries Term What are the 3 layers of the walls of the heart? Definition 1. the epicardium - outermost layer 2. myocardium - middle layer 3. endocardium - innermost layer Term Epicardium Definition outermost layer of the heart. made of connective tissue. functions to house blood.   aka visceral pericardium Term Myocardium Definition middle layer (and thickest layer) of the heart wall made of cardiac muscle Term Endocardium Definition Innermost layer of the heart wall made of connective tissue is "continuous" with the endothelium of the major vessels joining the heart. Term Definition Term How many chambers does the heart have? Definition four Term Where are the atria located? what is their function? Definition On top (The top two heart chambers)   Atria recieve blood returning to the heart have thin walls Term Where are the ventricles located? what is their function Definition The bottom (the ventricles are the bottom two chambers of the heart)   Term What divides the atrium and ventricles? Definition a septum Term what does an A-V valve do? Definition ensures that the blood flows only one way   the RIGHT A-V valve is a tricuspid the LEFT A-V valve is a BIcuspid   corrdae tendinae contract to prevent backflow of blood through the A-V valves Term Definition Term Chordae tendinae Definition attached to papillary muscles in the inner heart that contract during ventricular contraction to prevent backflow of blood through the A-V valves   when the chordae tendinae is relaxed, the valve is opened, when it is contracted, the valve is closed Term vena cavae Definition superior and inferior both bring blood from the body to the right atrium. Term Definition Term why does the right ventricle have a thinner wall than the left ventricle? Definition because the right ventricle only has to pump blood to the lungs, compared to the left ventricle which has to pump blood to the entire body Term pulmonary valve Definition found at the base of the pulmonary trunk functions to prevent a return flow of blood to the ventricle Term how many pulmonary veins are there? Definition four Term where does the left atrium recieve blood from? Definition Recieves blood from the four pulmonary veins Term Definition