How do muscles work in the human body? 2 Reasons with examples.

Mucles work via two ways, Contraction and relaxation. Example, contracting your bicep and relaxing your tricep bends your arm. They work this way by connecting to bones, and when they contract or relax it pulls the bone with it. Example, contracting your quads pulls the bone on one side and tightens it against your joint, straightening it like pulling a rubber band tight makes it go straight

Explanation:

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the animal that would be cutest if scaled down to the size of a cat? elephant

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.