A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls.
1 The. 2  for a eukaryotic cell is the same kind of structure, and has the same function as the plasma membrane of a prokaryotic cell. ( 3 ER) is a system of membrane-enclosed channels which ramifies throughout the cytoplasm of the cell. 4  It comes in two types--smooth and rough. , which is quite different from the peptidoglycan of prokaryotic cell walls. 2  The primary function of the cell wall is support, and inconjunction with the central vacuole, to create turgor (stiffness) in plant structures like leaves. 3  Plant cells contain a specialized vacuole called the. .
A eukaryote (/juËËkaeri.juËËkÃ¦ri/ oÊt /or/ juËËkaeriÉt-JUËËKÃ¦RIÉT-yoo-karr ee oht-OR-yoo-karr) ee Ét is any organism whose cells contain a nucleus and other organelles enclosed. Within membranes eukaryotes belong to The taxon Eukarya. or eukaryotaukaryotic cells also contain other membrane-bound organelles such as mitochondria and the Golgi apparatus. In addition, plants and algae contain chloroplasts. Eukaryotic organisms may be unicellular, or multicellular. Only eukaryotes have many kinds of tissue made up of different cell types.