![Muscles are bundles of cells and fibers. Muscles work in a very simple way. All they do is tighten up--that is, contract--and relax. You have two. - ppt video online download Muscles are bundles of cells and fibers. Muscles work in a very simple way. All they do is tighten up--that is, contract--and relax. You have two. - ppt video online download](https://slideplayer.com/3560687/12/images/slide_1.jpg)
Muscles are bundles of cells and fibers. Muscles work in a very simple way. All they do is tighten up--that is, contract--and relax. You have two. - ppt video online download
![all muscles in the body image search results | Human body muscles, Body muscles names, Muscle anatomy all muscles in the body image search results | Human body muscles, Body muscles names, Muscle anatomy](https://i.pinimg.com/736x/05/62/04/05620425c7456f4c2bbdeca0ae0b7c4a.jpg)
all muscles in the body image search results | Human body muscles, Body muscles names, Muscle anatomy
Studio MFlow Therapy Larnaca - Muscles Did you know you have more than 600 muscles in your body? And each muscle is made up by thousands of small fibres .Muscles do everything
![243,500+ Human Muscle Stock Photos, Pictures & Royalty-Free Images - iStock | Human muscle anatomy, Human muscle tissue, Human muscle fibers 243,500+ Human Muscle Stock Photos, Pictures & Royalty-Free Images - iStock | Human muscle anatomy, Human muscle tissue, Human muscle fibers](https://media.istockphoto.com/id/459951679/photo/male-anatomy-view.jpg?s=612x612&w=0&k=20&c=-T2Zk12yDJgrF3T2XPz80ThaC_vZKh-s7qCYQwXNAXA=)