ü The circulatory system is called the heart.
ü The heart of a human is between the chest.
ü Heart study is called cardiology.
ü The heart of a man weighs 300 grams. The heart weight of women is 250 grams.
ü The heart is the busiest part of the body.
ü The human heart has two atrium and two ventricles.
ü Human heart is 4 cells.
ü The heart of fish is 2 cells and the heart of reptiles is 3 cells.
ü Frog, crocodile and crocodile have an incomplete heart of 4 cells.
ü Cockroaches have a heart of 13 cells.
ü Earthworms have 8 hearts.
ü The heart of a newborn beats 140 to 160 times in 1 minute.
ü A five-year-old's heart beats 120 times in 1 minute.
ü The heart of a ten year old child beats 99 to 100 times in 1 minute.
ü The adult's heart beats 72 times in 1 minute.
ü The adult woman's heart beats 75 to 80 times in 1 minute.
ü The beating decreases in old age. And in old age the heart beats 60 to 65 times in 1 minute.
ü When a human performs heavy tasks, his heartbeat speed increases.
ü Statoscope is used to listen to the beats.
ü Statoscope was discovered by Lenk.
ü The human heart is surrounded by a membrane called pericardium membrane.
ü The pericardium membrane is filled with pericardial fluid. Which protects the heart from external strokes.
ü The circulation of blood in the human heart is why it is called the circulatory system.
ü Note: - The circulation system was discovered by William Harvey.
ü How is circulation in the heart?
ü First, the unoxygenated blood from the body parts is brought to the right atrium through the superficial mass.
ü Then unoxygenated blood (impure blood) is transported from the right atrium into the right ventricle.
ü The trilateral valve is present between the right atrium and right ventricle.
ü Anoxygenated blood is then sent from the right ventricle to the lungs via the pulmonary artery.
ü Unoxygenated blood in the lungs combines with oxygen to form oxygenated blood (pure blood). Which is absolutely clean.
ü Oxygenated blood is brought from the lungs via the pulmonary vein to the left atrium.
ü Oxygenated blood from the left atrium is transported to the left ventricle.
ü A double-sided valve is present between the left atrium and the left ventricle.
ü Oxygenated blood from the left ventricle is transported back through the aorta to each of the body's organs.
ü Blood comes twice in the human heart. Unoxygenated blood on the right side once. Oxygenated blood on the left for the second time. That is why it is called dual circulation system.
ü Important information
ü When the cholesterol starts to accumulate in the arteries, then the circulation of blood starts getting obstructed. And the coronary artery becomes blocked. Due to which, heart attack occurs.
ü When the blood circulation is obstructed and the pressure applied to send blood through the heart is called blood pressure.
ü Human normal blood pressure is 120/80 mmHg.
ü 120-systole pressure. And 80 - is called diastole pressure. mmHg millimeters of mercury is called pressure.
ü Systole refers to the narrowing of the artery. And diastole refers to the dilation of the artery.
ü Blood pressure is calculated through the broccian artery. It is located near our elbow.
ü Blood pressure is calculated through a sphygmomanometer.
ü The sphygmomanometer was discovered by Rewa Warishki.
ü The heart is examined through ECG (electro cardio graphy).
ü The second name of the second test of the heart is 24 hors holder test.
ü High blood pressure is called hypertension.
ü Lowering of blood pressure is called hypotension.
ü Heart rate is less than normal speed is called Baredicardio. And being more than normal is called tradicardio.
ü It takes 0.8 seconds between two beats.
ü The heart relaxes between the two beats.
ü There is 70 ml of blood pumping in one beat. And 4.5 to 5 liters of blood is pumping in a minute.