HUMAN HEART AND ITS FUNCTIONING
Size 12 x 9 cm and 300 gm weight
Enclosed in a tough, 2 layer connective tissue sac, the pericardium.
Has 4 chambers: 2 upper smaller auricles and 2 lower larger ventricles.
The right auricle opens into right ventricle through tricuspid valve.
This blood vessel is guarded by semi-lunar valve to prevent backflow of blood into ventricles.
Blood again returns to heart from the lungs in left auricle. Now the blood is oxygenated.
The left auricle opens into the left ventricle through a bicuspid valve.
From the left ventricle the blood flows throughout the body through a large blood vessel callec aorta.
To pump-out blood, the heart chambers undergo alternate contraction called systole and relaxation called diastole.
COMPARISON OF ARTERY, CAPILLARY AND VEIN
Lubbis produced by the closing of tricuspid and bicuspid valves while dupp is produced by the closing of semi-lunar valves.
This patch is the sino-auricular node which is called the pacemaker. Normal heart beat is 72/min.
Heart failure: When S.A. node does not initiate any impulse.
Sphygmomanometer measure the B.P. BP is 120/80 mm of Hg.
Pulmonary artery: The only artery which carries deoxygenated blood. It carries blood from right ventricle to lungs.
Pulmonary vein: The only vein which carries oxygenated blood. It carries blood from lungs to left auricle.
Size 12 x 9 cm and 300 gm weight
Enclosed in a tough, 2 layer connective tissue sac, the pericardium.
Has 4 chambers: 2 upper smaller auricles and 2 lower larger ventricles.
The right auricle opens into right ventricle through tricuspid valve.
This blood vessel is guarded by semi-lunar valve to prevent backflow of blood into ventricles.
Blood again returns to heart from the lungs in left auricle. Now the blood is oxygenated.
The left auricle opens into the left ventricle through a bicuspid valve.
From the left ventricle the blood flows throughout the body through a large blood vessel callec aorta.
To pump-out blood, the heart chambers undergo alternate contraction called systole and relaxation called diastole.
COMPARISON OF ARTERY, CAPILLARY AND VEIN
Lubbis produced by the closing of tricuspid and bicuspid valves while dupp is produced by the closing of semi-lunar valves.
This patch is the sino-auricular node which is called the pacemaker. Normal heart beat is 72/min.
Heart failure: When S.A. node does not initiate any impulse.
Sphygmomanometer measure the B.P. BP is 120/80 mm of Hg.
Pulmonary artery: The only artery which carries deoxygenated blood. It carries blood from right ventricle to lungs.
Pulmonary vein: The only vein which carries oxygenated blood. It carries blood from lungs to left auricle.
