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An … a day keeps the doctor away.

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

Limbs are connected with …

We absorb … from the food we eat so that they can fuel our bodies.

Just what the doctor …

Your skin covers most of your …

When we … we make the air exit our lungs.

Veins and arteries are called blood …

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

It is said your heart is as big as your …