Introduction A condition resulted by the action of antibodies or immunologically competent cells. Cause structural or functional damage of the normal components of the body. Literally means ‘protection against self’ but means ‘injury to self’ in actual. Ehrlich postulated the concept of horror auto-toxicus. Was proposed while observing goats producing antibodies against erythrocytes from other … Read more
The supporting cells of the nervous system that are non-excitable are called neuroglia or simply glia (glia=glue). They do not transmit nerve impulse (action potential) for which they are called non-neural cells or glial cells. They are about 10-15 times greater than the number of neurons. During infection, mostly they show or play an important … Read more
Platelets also called thrombocytes are the formed elements of blood. They are small, non-nucleated colorless and moderately refractive bodies. They are considered to be the fragments of the cytoplasm being formed elements of blood. They are about 2.5µ (2 to 4µ) in diameter and 7.5 cu µ (7 to 8 cu µ) in volume. They … Read more