Explain how adipose tissue serves as an important connective tissue in animals, highlighting its structure and functions.

Adipose tissue is a type of loose connective tissue primarily composed of adipocytes (fat cells). These cells are specialized for storing fat droplets, which push the nucleus and cytoplasm to the periphery. Its main functions include: 
1. Energy storage: Stores excess energy in the form of fat. 
2. Insulation: Provides a layer of insulation beneath the skin, helping to maintain body temperature. 
3. Cushioning: Acts as a protective cushion around vital organs like kidneys and eyeballs, absorbing shocks.