Looking inside - the cross section of arm explained
If you've ever looked at a cross section of arm, you probably realized pretty quickly that our limbs are way more complex than they look from the outside. We usually just see skin, maybe some veins, and the shape of muscles if we've been hitting the gym. But beneath the surface, it's a tightly packed, highly organized world of different tissues all stacked together to make movement possible. It's less like a solid block of wood and more like a high-tech cable filled with smaller wires, padding, and structural supports. ...