the structures of the heart

prezentatsiya powerpoint heart and blood unit 4 1 medcollege.ru the structures of the heart the heart is located almost in the center of the chest cavity and shifted somewhat to the left. its weight is about 250-300 g. the heart has four chambers – two atria and two ventricles. between the atria and ventricles located butterfly valves, and the output from the ventricles into the arteries – the semilunar valves. muscular wall of the ventricles much thicker than the walls of atria. 2 medcollege.ru the structures of the heart the heart wall has three-layer structure: the outer layer (epicardium) – consists of connective tissue. the middle layer (myocardium) – a powerful muscle layer. the inner layer (endocardium), the inner epithelial …

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