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.
Knots are intertwined loops of rope, cord, string or other flexible material, used to fasten two such ropes to one another or to another object. Knots, Bends, Hitches, Splices and Seizings are all ways of fastening cords or ropes, either to some other object such as a spar, or a ring, or to one another.The knot is formed to make a knob on a rope, generally at the extremity, and by untwisting the strands at the end and weaving them together.nots: How to Tie Knots. All about knots: This website contains descriptions and illustrations on tying over 35 knots, including: bowline knots, half hitch knot, overhand knot, hitch knot and many more!