BSC 1086C Lecture Notes - Lecture 1: Superior Vena Cava, Inferior Vena Cava, Interventricular Septum
Document Summary
One pump with four chambers- the heart. Two main circulations: pulmonary circulation: short lop that runs from heart to the lungs and baack to the heart, systemic circulation: long loop to all parts of the body and back to the heart. Two types of vessels: arteries- transport blood away from the heart, veins- transport blood back to the heart. Located in the mediastinum between 2nd rib and 5th intercostal space. Two-thirds to the left of the midsternal line. Superficial fibrous pericardium: protects, anchors, and prevents overfilling. Deep two-layered serous pericardium: parietal layer lines the internal surface of the fibrous pericardium, visceral layer (epicardium) on external surface the heart, separated by fluid-filled pericardial cavity (decreases friction) Four chambers: two atria (receiving chambers) Coronary sulcus (atrioventricular groove) encircles the junction of the atria and ventricles. Auricles increase atrial volume: two ventricles (discharging chambers) Anterior and posterior interventricular sulci mark the position. Layers of the heart wall of the septum externally.
