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What is the role of spincter in excretion |
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Answer» HEYAAA.... A SPHINCTER is a muscle that surrounds a body opening (the urethra or the anus, for example) and which should unconsciously remained TIGHTLY closed. During urination, sphincters relax and open when messages are relayed from your nerves and your BRAIN to the PELVIC floor muscles. ☺☺ |
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