Start studying chapter 4 embryonic, mature loose connective tissue. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Learn vocabulary, terms, and more with flashcards, games, and other study tools. dense connective tissue is found in many structures in the human body including tendons and ligaments. Watch the full video to learn all about the cells and components of dense connective tissue. Learn vocabulary, terms, and more with flashcards, games, and other study tools. subgroup one is loose connective tissue and it has fewer cells and fibers and more ground substance than subgroup two, dense connective tissue. Connective tissue (ct) is one of the four basic types of animal tissue, along with epithelial tissue, muscle tissue, and nervous tissue. Connective tissue is found in between other tissues everywhere in the body, including the nervous system. Embryonic connective tissues mesenchyme the precursor embryonic tissue for all types of connective tissue stellate undifferentiated cells and ground substance the lack of fibers under specific stimuli the cells differentiate into the cells of connective tissue - fibroblasts, adipoblasts, chondroblasts, osteoblasts, blood cells. Early in embryonic development, cells derived primarily from mesoderm separate from one another to form a loosely arranged tissue, the mesenchyme, which acts as a packing material between other structures. As the embryo develops, the mesenchymal cells differentiate to form epithelia (endothelium, mesothelium), muscle and connective tissues. Mesenchyme (embryonic) gives rise to all other connective tissues consists of connective tissue cells (mesenchymal cells) in a semi-fluid ground substance containing reticular fibres. Embryonic connective tissue mesenchyme loose connective tissue of the embryo that fills the embryo. Star shaped cells , abundant ground substance, very few fibers.