How Platelets Work? - Edu Foundation

When a tissue is wounded or a blood vessel is ruptured due to some injury, the blood flows through it. If not checked, it may cause an excessive loss of blood. Sometimes, this immense loss of blood even leads to death. However, the body has its own natural device of preventing the loss of blood by forming a "blood clot" which plugs the injury and stops further flow of blood, and also checks the entry of pathogenic microorganisms.

The process of blood clotting is a complex process which is mainly initiated and maintained by the platelets which circulate around the body along with other blood components.
In the region of injury, the platelets rupture and release a substance called thromoboplastin. It converts protein prothrombin into thrombin. Vitamin K is essential for the formation of prothrombin in liver. Thrombin then changes soluble fibrinogen protein into fibrin. The latter undergoes rapid polymerization to form long fibres. The fibres form a network over the damaged (injured) region, entrap blood corpuscles and form a blood clot.

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Circulatory System of Human Beings - Edu Foundation

Circulatory System of Human Beings Circulatory System basically helps in the conversion of deoxygenated blood into oxygenated blood. When the deoxygenated blood enters into the right attrium through upper and lower Venacava, The right attrium contracts so that the blood moves into the right ventricle through the valve. When the right ventricle contracts, The deoxygenated blood moves into the lungs through pulmonary arteries. Lungs convert the deoxygenated blood into oxygen-rich blood. Then it returns to left attrium through pulmonary veins. When the left attrium contracts, The blood moves into the left ventricle. When the left ventricle contracts, The blood flows to every cells of the body through Aorta. In this way, Circulatory System takes place inside our body. If you have still any doubts, then feel free to comment us.

What is Artificial Kidney? How it works? - Edu Foundation

Kidneys are most vital organs for survival of the organsisms. Though the kidneys remain active throughout the life, its efficiency gradually declines with normal ageing process. For example, its activity declines to about 50% by the age of 70 in human beings. The other causes of decline in the normal functioning of kidneys are diseases such as kidney infection, injury or restricted blood flow to kidneys. These abnormalities result in kidney damage and malfunctioning. A general term for decline in the performance of kidney due to a disease is kidney failure. Though it is not common, it may result to death within a couple of weeks if not treated properly. Kidney failure is often due to build up of potassium ions which causes heart failure. The failure of both kidneys immediately need medical intervention. There are two alternatives of kidney failure (i) A matching kidney from a healthy person may be transplanted, or (ii) An 'artificial kidney' machine may be employed in or...

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