Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Oh, sorry. Just testing out my musculoskeletal system. Whether your muscles are huge or not, so huge, ...

You have 3 different types of muscle: skeletal, smooth, and cardiac. Skeletal muscle alone accounts for over 650 different muscles. Have you ever wondered how many muscles you have in your body? The ...