BIOL 3225 Lecture Notes - Lecture 9: Cardiac Muscle Cell, Pulmonary Vein, Pulmonary Circulation
Document Summary
Supplies blood from the body to the right atrium. Pulmonary artery takes blood from the right ventricle to the lungs. Pulmonary semilunar valve serves as the door between the right ventricle and pulmonary artery. Supplies blood from the lungs to the left atrium. Aorta takes blood from the left ventricle to the body. Major cell type of the heart that is responsible for contraction. Have a longer refractory period: ensure that there"s enough time for rest and stuff blue represents deoxygenated blood (which returns to the heart from systemic circulation) and red represents oxygenated blood (which returns to the heart from pulmonary circulation). These cells are joined together by a series of intercalated discs. Within intercalated discs there are a lot of gap junctions: allow electrical information to move very rapidly through the bunch of cardiac myocytes at the same time leading to simultaneous contraction. They also have adhering junctions: help the cells stick together.
