S 12 Cell sociology: Cell association and interaction of between cells and their environment Multicellular organism: cellular and extracellular compartmwnt, cell surface is the boundary between two compartments Extracellular space extends outward from the outer surface of the plasma membrane and contains a variety of secreted materials that influence cell behaviour Extracellular. matrix: mainly, collagens proteoglycans, and a variety of non-collagen glycoproteins Extraneous structures: jelly coat, thick capsules around eggs, basement membrane, and the materials in which cartilage or bone cells reside§ 12. Cell sociology: Cell association and interaction of between cells and their environment Multicellular organism: cellular and extracellular compartmwnt, cell surface is the boundary between two compartments. Extracellular space extends outward from the outer surface of the plasma membrane and contains a variety of secreted materials that influence cell behaviour. Extracellular matrix: mainly, collagens, proteoglycans, and a variety of non-collagen glycopreteins. Extraneous structures: jelly coat, thick capsules around eggs, basement membrane, and the materials in which cartilage or bone cells reside