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Home Q & A Board Biology-Related Homework Help Biochemistry
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alexisblack alexisblack
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6 years ago
The esophagus connects to the stomach through a thick ring of smooth muscle called the:
 A) pharyngeal sphincter.
  B) duodenal sphincter.
  C) cardiac sphincter.
  D) rectal sphincter.
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umass508umass508
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6 years ago
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alexisblack Author
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6 years ago
You make an excellent tutor!
Marctheshark
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Yesterday
Thanks for your help!!
apelton
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2 hours ago
Correct Slight Smile TY
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