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.
Syphilis is a sexually transmitted infection (STI) caused by the bacterium Treponema pallidum. If it's not treated by a doctor, it can get worse over time and cause serious health problems. The infection can be active at times and not active at other times. When the infection is active, you have symptoms. When it's not active, you don't have symptoms, even though you still have syphilis.