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    Biology: Human Body Quiz
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Insulin and glucagon are ____ that regulate blood glucose. amino acids
Blood travels from your heart to your legs through ____. arteries
Human cells organize into ____ and then into organs. bronchi
The brain, heart, stomach, and lungs are examples of ____. hormones
The various pigments that give skin and hair color are ____. melanins
The trachea divides into two main ____ that lead to the lungs. organs
Proteins are polymers (chains) of ____. tissues
Blood travels from your legs to your heart through ____. veins

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