Because when mammals breathe (Respiratory) it causes their blood to circulate (Circulatory) ad they need their blood to circulate to live. Hope this was helpful. :)
The work together by.....
called organ systems. Examples include the cardiovascular system, which consists of the heart and blood vessels working together to circulate blood throughout the body, and the respiratory system, where the lungs and airways work together to facilitate breathing and gas exchange.
The central nervous system coordinates.
The central nervous system coordinates.
they both help your brain
poontah
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The respiratory and cirulatory system are alike by they both work together to bring oxygen to the cells of the body.
The respiratory and cirulatory system are alike by they both work together to bring oxygen to the cells of the body.
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the respiratory system and the digestive system share the Pharynx. The Respiratory system contains the eppiglottis, which keeps food going down the esophogus instead of the trachea