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.
Treponema pallidum is the causative agent of syphilis. Treponemes are mostly human pathogens, and have been studied extensively. One of these recent studies used limit-dilution procedures to isolate seven, helically coiled bacterial strains from faeces of swine that constituted two unidentified taxa.reponema pallidum is the causative agent of syphilis. Syphilis first appeared in the late fifteenth century, shortly after Columbus and his men returned from the New World. Treponema pallidum is capable of infecting all tissues.