Final answer:
Triglycerides make up about 90% of adipose connective tissue's mass. Adipocytes are the cells in adipose tissue responsible for storing fat for energy metabolism, insulation, and cushioning of organs.
Step-by-step explanation:
Triglycerides account for about 90% of adipose connective tissue's mass. Adipose tissue, which can also be referred to as fat tissue, is a type of connective tissue despite not having a standard extracellular matrix or fibroblasts and only containing a few fibers. The main component of adipose tissue are cells known as adipocytes, which are responsible for storing fat in the form of triglycerides. This storage is vital for energy metabolism, and adipose tissue also plays crucial roles in insulating the body to maintain temperature and providing cushioning for body organs. When observed under a microscope, the adipose tissue cells may appear virtually 'empty' because the fat gets extracted during the processing, leaving behind cell membranes that appear as thin lines and small nuclei as black dots at the cell edges.