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.
1 Cartilage is classified in three types: a) elastic cartilage, b) hyaline cartilage, and c) fibrocartilage, which differ in the relative amounts of these three main components.  Blood is considered a specialized form of connective tissue.