| A ____ is anything that promotes the formation of cancer. |
artery |
| The normal human body ____ is about 98° F. |
carcinogen |
| The aorta is the largest ____ leading away from the heart. |
heart |
| Blood cells are made in the ____ (spongy tissue) of large bones. |
immunity |
| The black circular opening of the eye is the ____. |
marrow |
| Your ____ is located just left of the center of your chest. |
pupil |
| The ability of your body to resist and fight infection is ____. |
temperature |
| The tube that carries urine out from the bladder is the ____. |
urethra |
