Fluorine has an atomic number of 9. the n = 1 energy level has two electrons, and the n = 2 energy level has seven electrons. flourine's valence is

Four types of motile cells in human body?

Approximately percent of the energy created by cell metabolism is used by the body to carry on its normal functions, such as respiration, digestion, reproduction, muscular movement, circulation, and cellular regrowth.

In what part of the body does the most muscle activity happen?