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CBSE Class 10 Answered

explain what is A. paricardium , B.transpiration C.bowman's capsule & D.pulse
Asked by | 15 Jul, 2008, 06:09: AM
answered-by-expert Expert Answer

The pericardium is a thin double-layered sac which encloses the heart. The outer layer is called parietal pericardium whereas the inner layer is called visceal pericardium. They enclose the pericardial cavity, filled with watery pericardial fluid. This fluid allows frictionless movement of heart.

The loss of water in the form of vapor from the aerial parts of the plant is known as transpiration. It helps in absorption and upward movemnet of water and minerals dissolved in it from roots to leaves. It also helps in temperature regulation.

Bowman's capsule is the double walled cup-shaped part of malpighian body. It encloses the glomerulus. It is the expanded end of a kidney tubule or nephron. Fluids from blood in the glomerulus, called glomerular filtrate, are collected in the Bowman's capsule and further processed along the nephron to form urine.

Pulse is the rhythmic contraction and expansion of the arteries with each beat of the heart. It is used to measure the rate of heart beat. Pulse can be felt in places where arteries are close to the skin. It is often measured by feeling the arteries of the wrist.

 

Answered by | 15 Jul, 2008, 09:44: AM
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