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.
Stopper Knot. The stopper knot is very handy in several situations. For instance you could tie one in the end of the rope it stop it unexpectedly passing through the belay/abseil device. Use it to backup your figure eight follow through tie in knot. Two stopper knots are used to make the double fishermans for joining two ropes. To tie a stopper knot in the end of the rope, follow these steps. Step 1: Form a loop. Step 2: Form a second loop behind the first one, as shown. Step 3: Pass the end back through both loops.