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.
Normal Blood Pressure. Many people define normal blood pressure as an average reading of 120/80 or below. An average blood pressure can only be determined when multiple readings are taken over at least three days. Several things (such as lifestyle and family history) can affect a person's blood pressure range. Be mindful of this when comparing your reading to what's considered normal blood pressure..