Approximately the size of your fist; superior surface of the diaphragm, left of the midline, anterior to the vertebral coumn, posterior to the sternum
Recieves O2 poor blood from the body and pumps it to the lungs to get more O2.
Recieves high O2 blood from lungs and pumps it to the rest of the body.
Blood flow between the heart and the lungs.
Blood flow between the heart and the rest of the body.
Recieving chambers; 2 superiorly.
Pumping chambers. 2 Inferiorly
Bottom pointed Portion that lies left of the midline and anterior to the rest of the heart.
Broad posterior surface
Triple layer sac around the heart. It protects and anchors the heart, prevents overfilling of the heart with blood, and allows for the heart to work in a relatively friction free enviroment. Composed of Fibrous pericerdium and a two layer serous pericardium.
Superficial layer of the pericardium. Strong layer of denseC. T
They are the recieving chambers of the heart. The right and left are divided by interatrial septum. Each side has a protruding auricle;Pectinate muscles mark the atrial walls. Blood enters the right sd from inferior and superior Venae Cavae, and coronary sinus. Blood enters the left side from the pulmonary veins.
They are the discharching chambers of the heart. right and the left side are separated by the interventricular septum; Papillary muscles and trabeculae carneae muscles mark the venticular walls. Right sd pumps blood into the pulmonary trunk, left side pumps blood into the Aorta.
The functional blood supply to the heart muscle itself.
They ensure blood delivery to the heart even if major vessels are occluded.
Ensure unidirectional blood flow through the heart.
AV valves prevent backflow into the awtria when ventricles contract; first sound "lub" (AV valves closing)
Anchor AV valves to papillary muscles
Aortic Semilunar Valves
Lies between the left ventricle and the aorta
Pulmonary Semilunar Valve
Lies between the right ventricle and pulmonary trunk.
Prevent backflow of blood into the ventricles; Second sound "dup"- The semilunar valves closing.
Muscle in the heart. Striated, short, fat, branched, interconnected. Intercalated discs anchor cardiac cells together and allow free passage of ions. This muscle behaves as a functional syncytium.
This connective tissue acts as both tendon and insertion.