Permutation is an ordered arrangement of a group of objects. 1  The permutation of n objects taken r at a time is represented as nPr. 2  The permutation or arrangement of 9 different balls in 3 different rows can be done in 9P3 = 504 ways.  The permutation of n objects taken all at a time is represented as nPn = n!.
Collagen is a protein that is part of cartilage, bone, and other tissues in animals and humans. People use collagen from chickens for medicine. Chicken collagen is used to treat joint pain associated with many types of arthritis and surgery, as well as back pain, neck pain, and pain following injury.
By Jim English and Hyla Cass, MD. Collagen is the protein that forms connective fibers in tissues such as skin, ligaments, cartilage, bones and teeth. Collagen also acts as a kind of intracellular âglueâ that gives support, shape and bulk to blood vessels, bones, and organs such as the heart, kidneys and liver.rocollagen is then used to manufacture one of several types of collagen found in different tissues throughout the body. There are at least fourteen different types of collagen, but the most common ones are: Type I: Makes up the fibers found in connective tissues of the skin, bone, teeth, tendons and ligaments.