| Atrium (heart) |
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Information AboutAtrium (heart) |
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HUMAN HEART Humans have a four chambered heart. The Right Atrium receives de- Oxygen ated Blood from the Superior Vena Cava and Inferior Vena Cava . The Left Atrium receives oxygenated blood from the left and right Pulmonary Vein s. The atria do not have ). Internally, there is the rough musculae pectinati, crista terminalis which acts as a boundary inside the atrium and the smooth walled part derived from the sinus venosus. There is also a fossa ovalis in the interatrial septum which was used in the fetal period as a means of bypassing the lung. There are two atria, one on either side of the heart. On the right side is the atrium that holds blood that needs oxygen. It sends blood to the right Ventricle which sends it to the lungs for oxygen. After it comes back, it is sent to the left atrium. The blood is pumped from the left atrium and sent to the ventricle where it is sent to the aorta which takes to the rest of the body. |
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