( http://www.abnova.com ) - Hemocytometer or Cell Counting Chamber is frequently used to count cell numbers such as cell density of cultured cells in research labs and blood count and sperm count in clinical labs. For counting of attached cells, cells are trypsinized, mixed with a dye (Trypan Blue), loaded onto a hemocytometer and then counted under a microscope. More videos at Abnova http://www.abnova.com