This video contains detail description of Blood and its components like PLASMA,WBC,RBC,EOSINOPHILS,NEUTROPHILS,BASOPHILS,T and B lymphocytes,Monocytes etc and its functions.<br /> Working of Heart: <br />1.In mammalian heart,oxygenated and deoxygenated blood remain completely separate in left and right half respectively. <br />2.The deoxygenated blood from the entire body is brought to the right atrium. <br />3.The oxygenated blood from lungs is brought to left atrium by four pulmonary veins.<br /> 4.The two auricles contract and push blood into respective ventricles through right and left atrio-ventricular apertures.The backward flow of blood from auricles into the inferior vene cava is prevented by valves. <br />5.The two ventricles contract simultaneously.From right ventricle deoxygenated blood is pumped into pulmonary trunk and is carried to lung by pulmonary arteries.Presence of cuspid valves on the atrio-ventricular aperture prevent the back flow of blood into auricles. <br />6.From left ventricle oxygenated blood enters aorta.It distributes blood to all parts of the body except the lungs. <br /><br />Separation of deoxygenated and oxygenated blood results in two independent circulations: <br />a)Pulmonary circulation for the oxygenation of deoxygenated blood.<br /><br /> b)Systemic circulation for the supply of fully oxygenated blood toall body organs. <br />Heart beat and Cardiac Cycle: 72 times per minute and 0.8 secs<br /> BLood Pressure: 120/80mmHg measured by an instrument called Sphygmomanometer.
