Cytoplasm. The cytoplasm is the part of the cell which does all the work. Different cells do different jobs, however whatever the job is it will require energy in the form of a chemical called ATP. This energy containing chemical is produced by tiny organelles in the cell called mitochondria. Muscle cells contain two very special chemicals called actin and myosin.
Definition of TREPHINATION. : an act or instance of perforating the skull with a surgical instrument. ADVERTISEMENT.efinition of TREPHINATION. : an act or instance of perforating the skull with a surgical instrument. ADVERTISEMENT.
By Michael Perry, M.D. Degenerative foraminal stenosis is a type of spine deterioration that is a common result of aging. Specifically, foraminal stenosis involves the narrowing of one or both of the vertebral canals (intervertebral foramina) through which nerve roots are given space to branch off the spinal cord.