Lysosomes are organelles found in all animal cellsUNIQebc27f9282a7aef-nowiki-00000001-QINU1UNIQebc27f9282a7aef-nowiki-00000002-QINU and less commonly found in plant cells, that consist of hydrolytic digestive enzymes enclosed by a single-layer membrane (vesicle).
Their purpose is to break down substances that are harmful or no longer useful for the cell, or even entire organelles, and recycle their components for later use by the cell. Lysosymes are present in greater numbers in white blood cells, since they are needed to break down toxic substances and bacteria that have been taken in by endocytosis.
The hydrolytic enzymes found within the lysosomes are all produced in the rough endoplasmic reticulum (RER) and transported to the Golgi apparatus for modification. They are then released from the Golgi apparatus inside vesicles.
- ↑ Sullivan J.A., CELLS Alive!, 1994. Cited: 24/11/2016 (Available from: http://www.cellsalive.com/cells/cell_model.htm)
- ↑ Alberts B., Johnson A., Lewis J., Morgan D., Raff M., Roberts K., Walter P., ‘Molecular Biology of the Cell’, 6th Edition, New York: Garland Science, Taylor & Francis Group. 2015. Page 642