the muscles in the intestinal walls are different. Abdominal muscles are skeletal muscles that are under voluntary control, whereas the intestinal or bowel wall muscles are smooth muscles that are not under voluntary control. These
I was running (I'm a teenager 15 years old) and it feels like there's something sitting on my chest and I get these weird cramps around my rib cage. What is it? Byanon198019— On Jul 18, 2011 I think my chest cramps are from a pulled muscle. I lifted a really heavy box up ...