For volume shippers looking for the most economical ground delivery, Parcel Select is the best option available. As of January 27, 2013, Parcel Select was split into Parcel Select, for online purchasing, and Standard Post for purchasing at the Post Office.
Dorsalgia (medical condition): Pain felt in the back that usually originates from the muscles,...more Â». See also: Chronic Back pain: Â»Introduction: Chronic Back pain. Â»Symptoms of Chronic Back pain. Â»Causes of Chronic Back pain. Â»Treatments for Chronic Back pain. Dorsalgia: Back pain.
The dorsal nerve cord is later modified in vertebrates into the central nervous system which is composed of the brain and spinal cord. Dorsal nerve cord is mainly found in subphylum Vertebrata. Dorsal means the back side, as opposed to Ventral which is the front side of an organism. In organisms with Bipedalism dorsal is the back and ventral is the front. In organisms which walk on four limbs the dorsal surface is the top (back) and the ventral surface is the bottom (belly).