KIN 2500 Chapter : Chapter 13 Outline
15 Mar 2019
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Left surface- faces the left lung; extends from the base to the apex. Inferior surface- rests on the diaphragm and is found between the apex and the right surface. 13. 2: pericardium- the membrane that surrounds and protects the heart, confines the heart to its position in the mediastinum while also allowing sufficient freedom of movement for contractions, consists of 2 portions, 1. Myocardium- middle: responsible for pumping action of the heart, composed of cardiac muscle tissue- approx. 95% of heart wall: the muscle fibers are wrapped and bundled with connective tissue sheaths composed of endomysium and perimysium, myocarditis- inflammation of the myocardium, usually occurs as complication of viral infection, rheumatic fever, or exposure, 3. From the av node, the action potential enters the atrioventricular (av) bundle (also known as the bundle of his: this is the only site where action potentials can conduct from the atria to ventricles, 4.
