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________________________carry blood back to the heart.  

__________________________is the pathway that food takes through the digestive system.

Which one is not a common anatomical plane?

The inside of bones are filled with_________________________________________.

Which of the following is located at the base of the neck and helps regulate the rate of metabolism and maintain the body’s levels of calcium and phosphorus?

_______________________________are the main organs of the respiratory system.

Which of the following body systems gives the body its shape and support?

Major structures of the male reproductive system include the ovaries, fallopian tubes and uterus

Approximately how many bones are in the human body?

___________________________bacteria will show pink under a microscope after staining.