Normal. The two major sounds heard in the normal heart sound like âlub dubâ. The â lubâ is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,â dubâ or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.
A subscript or superscript is a character (number, letter or symbol) that is (respectively) set slightly below or above the normal line of type. It is usually smaller than the rest of the text. Subscripts appear at or below the baseline, while superscripts are above.
What does 'mean' mean in math terms? The mean is the average you're used to, where you add up all the numbers and then divide by the number of numbers. The median is the middle value in the list of numberâ¦s. To find the median, your numbers have to be listed in numerical order, so you may have to rewrite your list first.