Think: chest, back, legs, arms, shoulders, and abs You may have heard these body parts further divided down into smaller muscles or muscle groups, such as: lats, traps, quadriceps, hamstrings ...

PRESENTER:'It's quiet and everyone is fast asleep.' PRESENTER:Muscles and bones keep us moving 24 hours-a-day, even when we're asleep. Without muscles or bones, we wouldn't even be able to get out ...

Muscles are attached to bones by tendons. Muscles contract to move our bones by pulling on them. However, muscles can only pull; they cannot push. This is why they usually work a joint in pairs.