This document provides information on various techniques for disaggregating animal tissue into single cells for cell culture, including mechanical, enzymatic, warm trypsinization, cold trypsinization, and using collagenase. It also discusses subculturing cells, cell counting using a hemocytometer, viability assays with trypan blue staining, maintaining aseptic technique to prevent contamination, and cryopreserving cells in liquid nitrogen with DMSO. The key steps and principles of each technique are explained.