chordae tendineae- the chordae tendineae play a vital role in holding the atrioventricular valves in place while the heart is pumping blood. Attach on one end to the edges of the tricuspid and mitral valves of the heart and on the other end to the papillary muscles, small muscles within the heart that serve to anchor the valves.g)papillary muscles- The papillary muscles attach to the lower portion of the interior wall of the ventricles. They connect to the chordae tendineae, which attach to the tricuspid valve in the right ventricle and the mitral valve in the left ventricle. The contraction of the papillary muscles opens these valves. When the papillary muscles relax, the valves close.h)fossa ovalis- is a depression between the right and left atria that forms during fetal life called foramen ovale. In fetal circulation blood travels through this opening, foramen ovale.i)coronary arteries- The heart tissue (myocardium) is nourished by the coronary arteries. The left coronary artery arises from the ascending aorta and then branches into the anterior interventricular artery and the circumflex artery. The right coronary artery also branches from the ascending aorta and branches to form the posterior interventricular artery and the right marginal artery.j)Aorta- Ascends toward the right from the left ventricle. Then curves posteriorly & to the left. Continues downward posterior to the heart & just anterior to the vertebral column, through the diaphragm & into the abdomen. It carries oxygen rich blood to various partsof the body through its branches 3.What is the function of fibrous skeleton of the heart? 4.What is the function of chordae tendineae and which heart valves have them attached? Give all possible names for these valves. - 5.Why does the heart need coronary circulation? Name main coronary vessels. –
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