The answer is <span>The respiratory system supplies the oxygen that the cardiovascular system transports to the different cells for the production of energy.
When air enters the lungs (part of the respiratory system), it passes all way to the alveoli, the smallest functional units of the lung. There, oxygen from the air enters the capillaries, the smallest blood vessels, next to the alveoli. Once in the blood stream, the cardiovascular system transports oxygen to different cells where it is used for the energy production.</span>
the answer is the sympathetic nervous system i got that answer on my test
Explanation:
under what circumstance does a negative cell presents An antigen to another negative cell
Don't pollute the Earth.
Don't need gas.
biotic- living things
abiotic- non living things
