In the sliding filament model of muscle contraction, the myofilaments slide over each other, resulting in the overlapping of actin and <span>myosin. Hope this helps. Have a nice day. Feel free to ask more questions. Thank you.</span>
It could be a lump of coal. Since you can break pieces off, maybe charcoal ... the real thing, not a "briquet". Do your hands get all black when you handle it ?
