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vc chap 17 SG

VcLVN A&P chap 17 study guide

What is the function of the heart? pumps blood through the arteries, capillaries & veins.
Describe the location of the heart with respect to the lungs and to the diaphragm. apex of the heart lies directly on the diaphragm & lies in the mediastinum directly behind the sternum
What is the shape and size of the heart? like a person's closed fist. average weight is about 310gm in males & 225gm in women. cone shape
Name the three pericardial membranes. Where is the serous fluid of the heart located and what is it's function? Fibrous, Parietal, Visceral fluid located between pericardial space - 3tsp that prevent friction
What are the three layers of the heart and in what order do they appear beginning with the outer layer? epicardium, myocardium, endocardium.
Name the veins that enter the right atrium. superior vena cava-carries the blood from the upper body and the inferior vena cava- carries the blood from the lower body carries blood from the lower extremeties.
Name the artery that leaves the right ventricle . Where is the blood going? Pulmonary Artery going to Lungs.
Name the artery that leaves the left ventricle. Where is the blood going? Coronary Arteries then Aorta then to the Neck/Head & organs of the rest of the body
What is the function of the right and left AV valves. Prevent Backflow
Define the cardiac cycle the precise sequence of events that keeps blood moving from the veins, through the heart and into the arteries
What is the difference of the movement of blood from atria to ventricles and the movement of blood from ventricles to arteries? Movement from the atria has more pressure to keep the circulation going.
What is the order of the conduction pathway? 1 SA sinoatrial valve 2 AV atrioventricular valve 3 AV Bundle 4 Purkinje fibers
Why is the heart considered a double pump? The first pump carries oxygen-poor blood to your lungs, where it unloads carbon dioxide and picks up oxygen. Then delivers oxygen-rich blood back to your heart. The second pump delivers oxygen-rich blood to every part of your body.
What is the normal range of heart rate for a healthy adult? 60 to 100 beats a minute
systole means contraction
diastole means relaxation
purpose of the aortic and pulmonary semilunar valves. prevent flow in the opposite direction.
Name the veins that enter the left atrium pulmonary vein- comes from the lungs
Created by: acmkibc