Prokaryotes are cells without a distinct nucleus.They have genetic material but that material is not enclosed within a membrane. Prokaryotes include bacteria and cyanophytes. The genetic material is a single circular DNA strand and is located within the cytoplasm.
Healthcare providers consider a normal blood pressure reading to be 120/80 or below. However, normal blood pressure can actually fall anywhere in a range from 90/60 to 120/80 -- it's not just one set number. The top number of the blood pressure reading is called the systolic pressure.
The five blood pressure ranges as recognized by the American Heart Association are: 1  Normal blood pressure. Congratulations on having blood pressure numbers that are within the normal (optimal) range of less than 120/80 mm Hg. 2  Prehypertension (early stage high blood pressure)