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.
What Is Syphilis? Syphilis is a sexually transmitted infection caused by a type of bacteria known as Treponema pallidum. According to the Centers for Disease Control and Prevention (CDC), in 2013, more than 56,400 cases of syphilis were reported in the United States.