cells and body systems

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The kidneys, which remove dissolved wastes from the blood, are organs of the

In which process is oxygen used to release the energy stored in food

Organisms are classified as insects based on their

What is the main function of the circulatory system?

Infectious diseases are caused by

Nutrients from digested food enter the blood stream through the process of

Which two systems of a rabbit\'s body must be working together for the rabbit to run away from a fox?

What is the function of DNA in a cell