Blood - Words and Definitions 1

Match the definitions with the words.
completely clean and free of bacteria
if something can be passed from one person to another, mostly by air
a liquid becomes thicker
disease in which there are not enough red blood cells in your body
disease of the liver that makes your skin yellow
something that your body produces to fight off diseases
to give something to a person in order to help them
an unexpected situation that can be very dangerous
organ near your stomach that controls the quality of blood
blood vessel that brings blood from your heart to other parts of the body