11 human body systems name the systems

The male reproductive system comprises of a pair of testes that are present in a thin-walled sac called the scrotum . The scrotum is contained within the abdominal cavity in the embryonic stage. Shortly before birth, they come down and remain outside throughout life. This is because t..

Biological ageing affects everybody. It is a deleterious process, which affects the functioning of the cells, tissues, organs and finally the organism itself. Like ageing, death is also a biological event. It occurs due to breakdown in body functioning. Causes of death in humans..

The human circulatory system is a closed circulatory system. The blood flows in closed vessels without coming in direct contact with the cells of the body. The walls of the blood vessels are made up of three layers: Inner endothelium - single layer of cells T..

Like pressure, volume, temperature and internal energy, we have another thermodynamic variable of a system, named entropy . In a given state of equilibrium, the system has a definite value of entropy. If the system has a temperature T (in absolute scale) and ..

It is the Acquired Immuno Deficiency Syndrome. The leucocytes are attacked and killed by the virus causing AIDS. This virus is called the HIV - Human Immuno Deficiency virus. The immune system of the body is destroyed and the infected person dies of multiple infectious..

.e., a to and fro motion. A given point in the path is crossed by the body in opposite directions at regular intervals. This is called oscillatory motion. All oscillatory motions are periodic but not all periodic motions are oscillatory. On observing an oscillating system, like ..

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) Antibodies consist of heavy and light chains and variable and constant portions. 11) Acquired immunity is of 2 types namely Active and passive immunity. 12) Cellular immunity refers to destruction of antigens by T-cells and humoral immunity refers to destruction of antigens by antibodie..

Units of Nervous System - The units of nervous system are specialised cells called the neurons . The general structure of a neuron is as follows: Neuron Around the cell body are short sensory projections called the dendrons. The fine branches of dendrons are called the..