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When we … we make the air exit our lungs.

Blood travels through the …

It is said your heart is as big as your …

An … a day keeps the doctor away.

Blood helps bring oxygen to the cells, to do that it needs to get … in the lungs.

… is produced in the kidneys and stored in the bladder.

Your … protect your heart.

Veins and arteries are called blood …

The two bones under your neck, that connect to your shoulders are called … bones.

Your skin covers most of your …