<span>The primary organs of the respiratory system are lungs, which function to take in oxygen and expel carbon dioxide as we breathe. The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.</span>
Arteriolar blood pressure increases in response to
Adrenaline hormome secreted by Adrenal gland in case of emergency or in do or die conditions.
when this hormone is secreted blood pressure and heart beat increases. more blood is directed towards skeletal system that allows us to face the problem.
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