Final answer:
Proteoglycans serve two main functions in the body: they act as structural components of the extracellular matrix and have specific interactions with other molecules. They are found in various tissues, particularly in loose connective tissue.
Step-by-step explanation:
Proteoglycans, which are carbohydrate-containing protein molecules, serve two main functions. Proteoglycans serve two main functions in the body: they act as structural components of the extracellular matrix and have specific interactions with other molecules. They are found in various tissues, particularly in loose connective tissue.
Firstly, they act as structural components of the extracellular matrix (ECM), providing support and maintaining the tissue's structure. Secondly, proteoglycans have specific interactions with other molecules such as collagen, elastin, and growth factors, contributing to the characteristic turgor of various tissues. Proteoglycans are found in various tissues, specifically in loose connective tissue.