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What is Excretion in Animals?
The proper functioning of cells results in the production of certain waste products. These byproducts may cause harm to the body and thus are efficiently removed from the body by the process of excretion. The excretory system of humans is made up of kidneys, ureters, urinary bladder, and urethra. Get Excretory System in Animals Homework Help by Tutorspoint.
Organs involved in excretion:
Kidney: The filtering house of the body
Blood contains both harmful as well as useful substances. Removal of these harmful substances requires proper filtration of blood which is done inside the kidneys with the help of blood capillaries. Toxic waste is removed in the form of urine which contains waste dissolved in water.
Ureters: These are tube-like structures that help in the transport of urine from the kidney to the bladder.
Urinary Bladder: It is a hollow organ that collects urine coming from the kidney and stores it till it is passed out of the body.
Urethra: It is a tube-like structure that connects the urinary bladder to the end part of this tube known as the urinary opening from where urine is passed out.
Human Excretory System
The composition of urine:
Water accounts for 95% of urine along with 2.5% urea which is a highly toxic substance produced inside the body and thus needs to be removed immediately and 2.5% other waste material. Urea is the major excretory product in humans.
In the condition of Kidney failure in which the filtration process is hindered inside the body accumulation of waste and harmful materials starts taking place. Thus artificial blood filtration is done and this process is known as dialysis.
Water along with salt is also removed from our bodies in the form of sweat. This is helpful in keeping our bodies cool during summer.