Routing Protocol Definition. A routing protocol is a set of rules used by routers to determine the most appropriate paths into which they should forward packets towards their intended destinations.
Spindle fibers are protein structures that form early in mitosis, or cell division. They consist of microtubules that originate from the centrioles, two wheel-shaped bodies located in the centromere area of the cell. The centromere is also known as the microtubule organizing center.
Some of the spindle fibers extend out and connect to a kinetochore on either side of the centromere. The spindle fibers pull and tug on the kinetochores until all the chromosomes are lined up across the center of the cell. During metaphase, the spindle fibers form a lemon-shaped array. This is called the mitotic spindle.