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.
One Handed Shoelace Knot. Here's the ideal way to tie shoelaces with one hand: Lace the shoe with the bottom end permanently tied off, then secure the top end with a simple loop knot. Reef Knot. The Reef Knot is basically a Standard Shoelace Knot minus the loops.ere's how to tie this basic knot, known as a Half Knot or Overhand Knot. Double Starting Knot. A double starting knot holds tighter, which is great when tying slippery shoelaces or when learning new knots, especially for kids. Begin as for a standard Starting Knot, then loop around and through for a second time.