inside the body
a blood vessel that carries blood away from the heart to the body
artery
the basic body unit of all living things; cells can only be seen through a microscope
cell
one of a pair of organs that allows terrestrial animals to take in oxygen from the air and remove carbon dioxide from the bod
lung
a part of the cells of living things containing chemical information that determines which characteristics an individual inherits from its parents, such as eye color or hair color
gene
the column of vertebrae that runs from the skull down the back
spine