In biology, a matrix is a tissue in animal or plant cells in which more specialized structures are embedded. The matrix helps in cell shape determination and fills the space present within the mitochondrion. There are different types of matrices, including extracellular matrix, cytoplasmic matrix, mitochondrial matrix, and nail matrix. The extracellular matrix is the matrix that fills the spaces between cells in a living organisms body). The internal structure of connective tissues is an extracellular matrix). The matrix in connective tissue helps in the proper functioning of these tissues like aiding protective roles of bones and smooth joint surfaces via cartilage. The main ingredients of the extracellular matrix are glycoproteins secreted by the cells).