Medical students learn to remember the principal attributes of the spleen by counting upward in odd numbers; 1, 3, 5, 7, 9, 11. That is because the spleen is 1 x 3 x 5 inches in size, weighs 7 ounces, and lies between the 9th and the 11th ribs—though in fact all those numbers but the last two are merely averages.
