Your heart functions in your body as a(n)
a. series of joints responsible for endurance.
b. muscle that to pump oxygen around the body.
c. organ for absorbing vitamins and minerals.
d. filter for impurities.

Although there are a limited number of amino acids many different types of proteins exist because..

In what layer of the sun is energy transfers between atoms

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.