Now we know that just like our neurons muscle cells skeletal muscle cells do not actually divide by mitosis and the way that our skeletal muscle grows when we for example exercise is by increasing the thickness of our muscle cells so the muscle cell will actually increase in thickness. It will increase its diameter for example because we're going to grow our myofibos because the sacramentors will grow and this will increase the size of our muscle cells and will ultimately increase the size of the muscle overall. So that's what happens when we exercise in this concept this type of growing of the skeletal muscle is known as hypertrophy. Now let's move on to the different types of skeletal muscle. So we have type one skeletal muscle we have type two A and we have type two B. Now let's begin by describing what distinguishes each one of these muscles from the other.