five		a waste product from the breakdown of food
thoracic vertebrae		number of nerves we have
rib cage		these are caused by the diaphragm contracting
atlas vertebrae		the number of lumbar vertebrae we have
brain stem		brings in oxygen and releases carbon dioxide gas
spinal cord		these ribs don't attach in front to anything
floating ribs		seven pairs of ribs attach to this
respiratory system		supports your body and protects the spinal cord
hiccups		part of brain that controls the involuntary muscles
sternum		twelve pairs of ribs are attached to these
diaphragm		a thick sheet of muscle that help make the lungs work
thirty-one		allows you to move your head
carbon dioxide		little balloon-like sacs in the lungs
spine		links your brain to the rest of your body
alveoli		the network of nerve cells formed by the brain and spinal cord
central nervous system		protects the lungs, heart, liver, and stomach