subcostalis
noun
sub·cos·ta·lis
ˌsəb-käs-ˈtā-ləs 
plural subcostales
-ˌlēz
: any of a variable number of small muscles that arise on the inner surface of a rib, are inserted into the inner surface of the second or third rib below, and probably function to draw adjacent ribs together
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“Subcostalis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/subcostalis. Accessed 29 Nov. 2024.
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