<P> Spinal cord . Spinal membranes and nerve roots. Deep dissection . Posterior view . </P> <Li> <P> Spinal cord . Spinal membranes and nerve roots. Deep dissection . Posterior view . </P> </Li> <P> Spinal cord . Spinal membranes and nerve roots. Deep dissection . Posterior view . </P>

How does the length of the ribs change from rib pair 1 through rib pair 7