Skeletal Muscle Essential in the Breathing Process
This page is the CodyCross answer for the clue below from Earth, Group 3, Puzzle 4.
Question is: Skeletal Muscle Essential in the Breathing Process
and the answer is: DIAPHRAGM
Word Meaning:
DIAPHRAGM — (anatomy) In mammals, a sheet of muscle separating the thorax from the abdomen, contracted and relaxed in respiration to draw air into and expel air from the lungs.
Definitions from Wiktionary.