transpyloric plane
L1 where spinal cord ends celiac trunk and SMA originate off aorta
subcostal plane
L3
supracristal plane
L4 - aorta bifurcates aorta goes T12 to L4
intertubercular plane
L5 - where iliac veins join to form IVC IVC goes T8 to L5 (longer than aorta)