cells
tumors
melanin
diseases caused by substances such as germs
able to perform one special task or function
a condition that keeps and organism from working as it should
swellings on any part of the body that are not normal or usual
the way all the parts of something fit together
disease
organisims
specialized
structure
all living things, including animals, plants, and single-celled life forms
the smallest living parts of organisms
infections
a substance in skin cells that colors the skin
