Monocytes move to sites of infection and signal the immune system that a response is needed and are responsible for eliminating foreign substances. The absolute monocytes blood test measures the percentage of monocytes in relation to all white blood cells.
Parentheses are a pair of curved marks that you put around words or numbers to indicate that they are additional, separate, or less important. (This sentence is in parentheses.) 2.
Parenthesis is a name that denotes either of the pair of parentheses. It refers to one and not the set. The parenthesis on the left is the eponymous 'left parenthesis' or 'open parenthesis'