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Anat-The Heart
Question | Answer |
---|---|
size of heart | size of a closed fist |
location of heart | in the thoracic cavity in the mediastinum; protected by the ribcage and the sternum |
shape of heart | top is flat (base) and connects to major blood vessels, bottom is like the blunt, rounded point of a cone (apex) and points to the left side of the body |
parts of the pericardium | fibrous and serous pericardium |
fibrous pericardium structure/function | made up of dense (fibrous) irregular connective tissue for strength surrounds the heart and anchors it to the diaphragm and the base of the great vessels |
parts of the serous pericardium | parietal and serous pericardium and pericardial cavity (pericardial fluid) |
parietal pericardium location | lines the inner surface of the fibrous pericardium |
visceral pericardium location | lines the heart |
vein | any blood vessel that carries blood to the heart |
artery | any blood vessel that carries blood away from the heart |
auricle location/structure | like an extra little bit of an atrium-one found on each atrium; has a scalloped edge (ear-shaped) |
auricle function | adds extra volume to the atrium |
atrium structure | smaller of the two chambers and somewhat thin-walled |
ventricle structure | much larger and thicker-walled of the two chambers |
major veins connecting to the heart | superior vena cava, inferior vena cava, pulmonary veins |
superior vena cava function | carries blood above the heart back to the heart; empties into the right atrium |
inferior vena cava function | carries blood below the heart back to the heart; empties into the right atrium |
pulmonary veins (left and right) function | carry blood from the lungs to the left atrium |
major arteries connecting to the heart | aorta, pulmonary trunk |
aorta function | carries blood high in oxygen from the left ventricle to all the organs and tissues of the body (branches though) |
pulmonary trunk function | carries blood from the right ventricle to the lungs (divides) |
heart valves function | ensure a single, one-way flow of blood through the heart |
two atrioventricular valves | tricuspid and bicuspid |
tricuspid valve location | between the right atrium and ventricle |
bicuspid valve name/location | mitral valve; between the left atrium and ventricle |
aortic semilunar valve location | between the left ventricle and the base of the aorta |
pulmonary semilunar valve location | between the right ventricle and the base of the pulmonary trunk |
chordae tendineae structure/location | thin, white strands of collagen fibers (thin and tough tendons) that attach to the edge of an atrioventricular valve and the inner surface of the ventricular wall (papillary muscles) |
papillary muscles structure/function | finger-like projections that connect to the chordae tendineae |
direction of blood flow (simplistically) | flows from areas of high pressure to areas of low pressure |
systemic circulation parts | left atrium and ventricle and all the blood vessels that carry blood to all the peripheral organs and tissues of the body; blood to and from the body |
pulmonary circulation parts | right atrium and ventricle and pulmonary arteries and veins; blood to and from the lungs |