Connective tissue in the body comes in a variety of forms. In fetuses and embryos, we find embryonic connective tissue. Past the point of birth, there is mature connective tissue. There are six major types of mature connective tissue. First, we will look at loose connective tissue. In this type, fibers are loosely entwined with many cells embedded. EMBRYONIC CONNECTIVE TISSUE CONNECTIVE TISSUE PROPER ADIPOSE TISSUE. qAdult connective tissues ØConnective tissue proper Embryonic connective tissues Mesenchyme. Connective Tissues Embryonic Connective Tissues Histology of Connective Tissues. (Fibrocytes in mature tendon).