BMC- Soft Spine.

Lying on the floor thinking about the spine, long and stretching up my back, able to twist, bend and curl. Thinking about the nerves spreading from my spinal chord and brain down through my whole body like the vines on a tree, along each rib, out to the tip of each finger.

Lanclet amphiaxus shows how the soft spine is started with a front back and middle, digestive system, spine and spinal chord.