Certified Instrument Specialist (CIS) Practice Exam 2025 - Free CIS Practice Questions and Study Guide

Adipose tissue, commonly known as body fat, is primarily composed of adipocytes, or fat cells, which are specialized for storing energy in the form of fat. This tissue serves multiple critical functions, including insulation, cushioning of organs, and serving as an energy reserve.

The cellular framework of adipose tissue consists mainly of these adipocytes, which occupy most of the tissue volume and are responsible for its characteristic function of energy storage. This differentiates adipose tissue from other types of connective tissues like cartilage, nervous tissue, and muscle tissue, which each serve distinct roles in the body.

For instance, cartilage is a flexible connective tissue found in joints and structures such as the nose and ears; nervous tissue is involved in the transmission of signals throughout the body; and muscle tissue is responsible for movement. The predominant presence of adipocytes in adipose tissue highlights why fatty tissue accurately represents the composition of adipose tissue, making it the correct choice.