During puberty the testes of the man will begin to produce testosterone. This causes hair growth in multiple areas of the body and the voice change. Similarly, women begin to grow hair but also begin menstruation.
There are 2 functions for cell surface markers. The first is to recognize the outside cell. The second is to allow the cell to bind to substances outside the cell.
Cell surface markers are proteins expressed on the surface of cells that often conveniently serve as markers of specific cell types. There are different types of cell surface markers. These markers are vital for the human body to function. These markers also vitally affect the functions of other biological systems of other organisms and creatures such as animals.
<span>The coeliac plexus, also sometimes called the solar plexus because it's fibers radiate, is a bundle of nerves and can be found in the abdomen. The coeliac plexus has both incoming and outgoing nerves and links the two coeliac ganglia.</span>
