Final answer:
Connective tissue develops from the mesenchyme, which originates from the mesodermal layer of the embryo. Various cells differentiate from mesenchyme to form the diverse connective tissues in the body, performing crucial functions such as support and repair.
Step-by-step explanation:
All connective tissue in the body develops from a common origin during embryonic development. This origin is the mesodermal layer of the embryo, from which the first connective tissue, known as mesenchyme, forms. Mesenchyme, which serves as the stem cell line, later differentiates to give rise to various forms of connective tissue present in the adult body. Fibroblasts, hematopoietic cells, adipocytes, chondrocytes, and osteocytes are among the varied cells that contribute to connective tissue formation, all originating from mesenchyme or hematopoietic tissue in the bone marrow.
During the course of the development, another type of embryonic connective tissue called mucous connective tissue, or Wharton's jelly, forms in the umbilical cord. Post-birth, this particular tissue is not present, leaving only mesenchymal cell clusters scattered throughout the body to aid in repair and replacement after connective tissue injury. It is interesting to note that connective tissue regulates essential functions including support, storage, and protection, highlighting its vital role in the body's overall structure and function.