A variation can mean something that is slightly different from similar items of its type (also a variant or variety). It can also apply to a difference itself (e.g. a variat â¦ ion in temperature). In mathematics, variation is the function that compares values among variables.
Cartilage is a type of elastic connective tissue which acts as rubber-like padding to cover and protect the ends of bones at joints. It is a dense matrix of elastic and collagen fibers which are embedded in rubber like ground substance.
Three main types of cartilage can be distinguished. Hyaline cartilage is the most widespread and is the type that makes up the embryonic skeleton. It persists in human adults at the ends of bones in free-moving joints as articular cartilage, at the ends of the ribs, and in the nose, larynx, trachea, and bronchi. It is a glossy blue-white in appearance and very resilient.