No it is not the main energy source
Strength and speed best describe power.
There's six main functions of the skeletal system
1 - Support
Provides structural support for the entire body.
2 - Protection
Surrounds soft tissue- ex. ribs and sternum protect the heart and lungs, - skull protects the brain.
3 - Movement
Skeletal muscle is attached to bone so it pulls on the bone when it contracts.
4 - Mineral homeostasis
Stores calcium and phosphorus--minerals are released into the blood when needed.
5 - Blood cell production
Red bone marrow produces red blood cells, white blood cells and other blood elements.
6 - Storage
Storage of minerals and lipids(fats)---yellow marrow stores fat --(found in long bones).
A food label states that a serving of a particular product contains 13 grams of total fat and 20 percent of the Daily Value. This means that when you eat a serving of this product you will be getting 20 percent of the Daily Reference Value for total fat based on a 2,000-kcalorie diet.