BIOL 1215 Lecture Notes - Loose Connective Tissue, Umbilical Cord, Reticular Cell
Document Summary
Present in the embryo, the developing human from fertilization through first 2 months of pregnancy and in fetus, the developing human from the third month of pregnancy to birth: mesenchyme- Consist or irregular shaped mesenchymal cells embedded in semifluid ground substance, and delicate reticular fibers. Location- under skin and along developing bones of embryo, some are also found in adult connective tissue especially along blood vessels. Function- give arise to other types of connective tissue: mucous (wharton"s jelly) . Decription- consists of widely scattered fibroblasts embedded in a viscous jelly-like ground substance that contains fine collagen fibers. Presented in newborns, its cells arise from mesenchyme: loose connective tissue: Contains several types of cells (fibroblast, macrophage, plasma cells, mast cells, and adipocytes) and all 3 types of fibers (collagen, elastic, and reticular) embedded in a semifluid ground substance, arranged randomly throughout the tissue.
