Heart contains four chamber-
Atrium
1. Right atria
2. Left atria
Ventricles
3. Right ventricles
4. Left ventricles
Heart divided into right and left side by septum.
Atria; Recieving chamber
Ventricle; Discharging chamber
Atria
(Opening present in right atrium)
1. Right atrium
Right upper chamber of Heart receives deoxygenated blood from superior and inferior venacava and coronary sinus, anterior cardiac veins and small cardiac vein, send down to right Ventricle (through tricuspid opening).
2. Left atrium
Left upper chamber of heart, receives oxygenated blood from left and right pulmonary vein (4), pump it to the left ventricle (through mitral valve or bicuspid valve).
Ventricles
3. Right ventricles
Receives deoxtgenated blood from right atrium and pump it to the lungs through pulmonary artery.
4. Left ventricle
It receives oxygenated blood from left atrium and pump it into aorta.
Atria of Heart
Atria are receiving chamber of the heart.
Blood enters to right atrium from superior venacava and inferior venacava through coronary sinus.
Blood enters left atrium from pulmonary veins.
Ventricles of heart
Ventricles are discharging chambers of heart.
Right ventricle pumps blood into pulmonary trunk through pulmonary artery.
Left ventricle pumps blood into aorta and sends (oxygenated blood) that blood into systemic circulation.
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