The way in which waste chemicals are removed from the body of the animal depends on the availability of water. Aquatic animals like fishes, excrete cell waste as ammonia which directly dissolves in water. Some land animals like birds, lizards, snakes excrete a semi-solid, white coloured compound (uric acid). The major excretory product in humans …
Sometimes a person’s kidneys may stop working due to infection or injury. As a result of kidney failure, waste products start accumulating in the blood. Such persons cannot survive unless their blood is filtered periodically through an artificial kidney. This process is called dialysis.
The urine goes into the urinary bladder through tube-like structure is called ureters
Urine passed out through the urinary opening at the end of a muscular tube called urethra.
Storing organ of Urine is called urinary bladder.
The wastes dissolved in water are removed as urine. It contain urea, uric acid , ammonia , water etc.
The kidney is a filtering organ .The waste which is present in the blood has to be removed from the body. A mechanism to filter the blood is required. This is done by the blood capillaries in the kidneys.
The parts involved in excretion form the excretory system.
The process of removal of wastes produced in the cells of the living organisms is called excretion.
The English physician, William Harvey (A.D.1578–1657), discovered the circulation of blood. The current opinion in those days was that blood oscillates in the vessels of the body. For his views, Harvey was ridiculed and was called “circulator”. He lost most of his patients. However, before he died, Harvey’s idea about circulation was generally accepted asa …
