Let’s have some fun. 8)) What is the only skeletal muscle essential for life? ADVERTISEMENT 819 viewsApril 3, 2012 0 Joanne0 April 3, 2012 0 Comments Those who get it right receive a thumbs up click on their profile. (P.S. the heart is not skeletal muscle). 3 Answers ActiveVotedNewestOldest 0 Harold E.0 Posted 0 Comments It is the diaphragm!!! At first, the heart did cross my mind!! You are viewing 1 out of 3 answers, click here to view all answers. Register or Login