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Our stomach contains ____________ acid.
________ is an enzyme that breaks down proteins.
_______ is a type of sugar.
The _____ and micro _____ help the food move through the intestine.
___________ are the smallest blood vessels.
A ____ is a blood vessel that carries blood to the heart.
________ are blood vessels that carry blood away from the heart.
The ___________ system contains the heart and blood vessels and pumps blood around the body.
The organs are made up of _______.
Cells use glucose to release energy using a chemical reaction called ___________.
Too much ___________ can cause health problems like heart disease.