Excretion
Excretion is the removal of toxic substances and metabolic waste products[1]. In vertebrate animals, this process is mainly carried out by the lungs, skin and the kidneys[2], with the urinary system being the main excretory system. Excretion through the skin occurs through sweating, which results in the removal of water and small amounts of urea and salts. The kidneys filter about 180 litres of blood everyday and removes urea, toxins, medications, and excess ions through the formation of urine[3].
References
- ↑ Britannicacom. 1. Encyclopedia Britannica. [Online]. Available from: https://www.britannica.com/science/excretion [Accessed 5 December 2016].
- ↑ Wikipediaorg. 2. Wikipediaorg. [Online]. Available from: https://en.wikipedia.org/wiki/Excretion [Accessed 5 December 2016]
- ↑ http://science.jrank.org/pages/2626/Excretory-System-Excretion-in-humans.html