Stem cells are the body's raw materials â cells from which all other cells with specialized functions are generated. Under the right conditions in the body or a laboratory, stem cells divide to form more cells called daughter cells. These daughter cells either become new stem cells (self-renewal) or become specialized cells (differentiation) with a more specific function, such as blood cells, brain cells, heart muscle or bone. No other cell in the body has the natural ability to generate new cell types.
(December 2011) (Learn how and when to remove this template message) The hangman's knot or hangman's noose (also known as a collar during the Elizabethan era) is a well-known knot most often associated with its use in hanging a person.
Figure-8 on a Bight. A figure-8 knot can also be tied in a bight to form a fixed loop. This knot is usually tied near the end of a rope and used as a main rigging knot. The same knot can be tied by tying a figure-8 in the rope, passing the free end around something, and re-traced the knot.igure-8. The figure-8 knot can be used as a stopper knot (e.g. to prevent a rope from passing through a pulley). Its more common uses are in the forms tied in the bight or re-traced. No securing knot is required, but many people prefer to add an overhand backup.