Discuss why a person who has a spinal cord injury at C6 is spared from needing a ventilator. In order to answer you must consider what nerve innervates the diaphragm and which spinal cord segments contribute to this nerve.

Twenty one miles per hour

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.