Embryonic and Matured Tissues
1.Embryonic Connective Tissue
-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
Consist or irregular shaped mesenchymal cells embedded in semifluid ground
substance, and delicate reticular fibers.
under skin and along developing bones of embryo, some are also found in adult
connective tissue especially along blood vessels.
give arise to other types of connective tissue. B. Mucous (Wharton’s Jelly) –
consists of widely scattered fibroblasts embedded in a viscous jelly-like ground
substance that contains fine collagen fibers.
umbilical cord of fetus
2. Mature Connective Tissue.
-presented in newborns, its cells arise from mesenchyme.
A. Loose Connective Tissue:
-loosely arranged between cells.
1. Areolar Connective Tissue-
DESCRIPTION- Most widely distributed in the body. Contains several types of cells (fibroblast,
macrophage, plasma cells, mast cells, and adipocytes) and all 3 types of fibers
(collagen, elastic, and reticular) emb