Deutsch: Muskel
A muscle is a set of cells, which are able to contract. So, muscles can produce force and motion. They are primarily responsible for the movement and changing shape and appearance of our body, heart contractions and the bowel movement.
The types of muscles are
- skeletal,
- cardiac, and
- smooth.
Cardiac and smooth muscles contract without our thoughts and are called involuntary.
Muscles get their power from our fat. So every contraction "burns" some fat, which also (as a side effect) warms our body.