Connective tissue

Connective tissue is a fibrous tissue. It is one of the four traditional classes of tissues (the others being epithelial, muscle, and nervous tissue). 
Connective tissue (CT) is found throughout the body. It has 3 main components; cells, fibres, and extracellular matrix. 
Connective tissue makes up a variety of physical structures including, tendons, blood, cartilage, bone, adipose tissue, and lymphatic tissue. CT is classified into three subtypes: embryonic CT, proper CT, and special CT. 
Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals, making up about 25% of the total protein content.