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.
Tying a Basic Square Knot. Take two ropes and lay the right-hand rope over the other. To make this knot, you need two strings, ropes, etc. Alternatively, you can use the opposite ends of a single rope. In our example, we'll lay the right-hand rope (the orange one in the graphic above) over the left-hand rope (the yellow one).