What is The origin of the Erector spinae?

What if it's the left arm? When when you blow your nose your head hurts and you blow out blood? Is it possible to squeeze milk from your nipples during PMS? What organs does food pass through after leaving the mouth? My breasts don't hurt before my period They did 2 months ago but for the last 2 months they haven't hurt Why is that? What are the Characteristic of best value in contracting? Do cats farts stink? What parts of the American system are still in effect today? What is when you have vomit and you feel thirsty? Most muscles in the body are muscles? Does stress cause laryngitis? What color will a green truck be painted transluce it paint? What is lipo-flavonid? When was the Black Period in surgery? I haven't had my period for a month and half now after my surgery for ectopic pregnancy and have also checked for pregnancy but the result is negative why? Why is the gizzard comparatively more muscular than the protriventriculus? Is the liver a major storage system can store and release nutrients between meals? What are one of the functions of the digestive system? What does a proprietor manage? Are fingers cartilage or bone?