Question | Answer |
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 |