Difference between external intercostal muscles and abdominal muscles
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Explanation:
What do the names, internal and external intercostal muscles, mean?
Internal comes from the Latin word internus, which means within.
External means outside of.
The word intercostal comes from the Latin words inter, which means between, and costa, which means rib.
The internal intercostals then, are muscles between the ribs and located inside a structure, while the external intercostals are muscles between the ribs and located on the outside of a structure.
In the case of the intercostals, they are internal or external relative to one another
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