What are the functions of lipids and fats?

Lipids and fats are very important elements in our body. They are connective tissue. The body absorbs lipids and fats with food intake. They are the source of energy in our body.
Lipids include fats and fatty compounds.
Functions:
1. Energy – when burning 1 gram – 38.9 kJ of energy
2. Structural – are part of membranes (bilipid layer, for example)
3. Storage
4. Protective – from mechanical stress, from water
5. Regulatory – some hormones – lipids
6. Thermal insulation + Electrical insulation