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.
Organelles are parts of the cell which are adapted and/or specialized for carrying out one or more vital functions, analogous to the organs of the human body (such as the heart, lung, and kidney, with each organ performing a different function).ost important among these is a cell nucleus, an organelle that houses the cell's DNA. This nucleus gives the eukaryote its name, which means true kernel (nucleus). Other differences include: 1  The plasma membrane resembles that of prokaryotes in function, with minor differences in the setup.
The membrane-bound organelle (mini organ) in eukaryotic cells, aka those cells that contain a membrane-bound nucleus, that is the control center of the cell. The nucleus houses the genetic instructions necessary to synthesize proteins and other molecules needed for cell survival, growth, and reproduction. tubular structure that is made of protein and found only in animal cells. It is involved in cell division and the formation of flagella and cilia (types of pointy things that assist cells in what they do).