When you flex your muscles you are contracting them. When your muscle fibers gain tension through Actin and Myosin crossbridge cycling they may shorten due to the tension. This is called muscle contraction
<span>The number of friends they have does not affect the the peer pressure and the ability to stand up for their own values. </span>
<span>It sets accountability by establishing deadlines.
~Jurgen</span>
Virus culturing because it allows you to take the virus and control it so can put it into a vaccine
Germs is the microorganism that causes colds most.
