Sperm cells are probably the easiest cells to distinguish ... and can therefore be used to excise cells from dried samples on slides or cells in liquid culture. Furthermore, cells can be ...

The head of the sperm contains the genetic material ... cell and speeds up the nerve impulse. Muscle cells contain filaments of protein that slide over each other to cause muscle contraction.

Good thing too, because without sperm, animals couldn't reproduce. Muscle cells are full of long protein filaments that can slide past each other to contract the muscle, making it possible for ...