Final answer:
Proteoglycans and fibronectin proteins are key components that act as connective tissue glue, enabling cell attachment to the extracellular matrix, which is necessary for tissue cohesion and intercellular communication.
Step-by-step explanation:
The Components that Serve as Connective Tissue Glue
The components that primarily serve as connective tissue glue for cells to attach to the extracellular matrix include proteoglycans and fibronectin proteins. Proteoglycans are carbohydrate-containing protein molecules that are interwoven with collagen fibers, and they often form the bulky mass of the extracellular matrix. Fibronectin proteins are attached to these proteoglycans and also to collagen, which provides strength, forming a sticky mass that cells can adhere to.
Connective tissues are vital for not just connecting tissues and organs but also allowing cellular communication and providing structural support. The extracellular matrix is secreted by connective tissue cells and is comprised largely of the protein collagen and other components, like proteoglycans, which facilitate cell attachment and communicate with other cells inside the tissue. Fibronectin and integrin proteins form crucial links between the extracellular matrix components and the cells' plasma membranes.