Midbrain. The midbrain, also called the mesencephalon, is a small region of the brain that serves as a relay center for visual, auditory, and motor system information. It regulates autonomic functions, those that the body carries out without conscious thought, such as digestion, heart rate, and breathing rate.
A rational number is one that can be expressed as a fraction (or ratio), e.g. 1/3. There are fractions that are near Pi, for example: 22/7 = â¦ 3.142857 (PI = 3.14159265...) A closer fraction is: 355/113 = 3.14159292 However whatever fraction you have, you will never get exactly PI.
Real Numbers. In math, the real numbers contains both rational numbers and irrational numbers. The rational number is in the form of $\frac{5}{3}$, $\frac{-23}{40}$. And the irrational numbers like pi, $\sqrt 2$, any number in decimal representation like 2.4873.... where the digit is continuing in the way.