The process by which animals get rid of themselves of waste products of nitrogenous by-products of metabolism is known as excretion. The organisms control osmotic pressure – the balance between inorganic ions and water- and maintain acid-base balance through this process. This process helps in promoting homeostasis, a process that helps maintain the stability that helps the organs or biological systems to survive.
Excretion is also done by green plants, which produce water as respiratory products. The carbon dioxide released by human during exhalation is utilised by green plants for the process of photosynthesis. Plants get rid of excess water by transpiration and guttation.
In general, plants contain vacuoles which save all other metabolic waste. They are in a leaf cell, which allows vacuoles to crystallize. We usually see the vacuoles get filled, the leaf drops. These are known as Excretophores. Saps and gums are also the types of excretion displayed by plants, which we see with our naked eye.
In human beings and animals, urine and feces are both the types of excretion. These wastes are important as it avoids inducing sickness. Sweating is also a type of excretion displayed by the human beings- it helps to eliminate liquid through the surface skin to reduce the heat of the body. As it is a cooling process, this is important, warm water would make the overall body temperature higher. Without this process, we would have suffered from dehydration.
The act of unusable or undigested material from a cell is called Egestion.
Learn more about how important is kidney in excretion. Get the excretory system’s diagram from here.
Did you know that there are different modes of excretion: click here to know all about it?
What is the process of urine formation in human beings? Follow the link to know about it. Apart from excretory organs, lungs, liver and skin also help in excretion. Find out how.
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