Biology, 01.11.2019 12:31 jcultr4s3nse

How are valves in the circulatory system similar to sphincters in the digestive system?

a. both limit movement of substances through the system
b. both absorb excess fluid from the system
c. both add strength to the walls of the system
d. both actively push substances through the system
e. both control an exit to the system

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How are valves in the circulatory system similar to sphincters in the digestive system?

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