The video explains that all living things are made of cells, the basic units of life. Cells are classified into prokaryotic, which lack a nucleus, and eukaryotic, which have a nucleus. The video describes cell structures like the nucleus, cytoplasm, and cell membrane, and explains the difference between unicellular and multicellular organisms. It also covers cellular differentiation and how cells form tissues, organs, and organ systems.

Explain the process of cellular differentiation in multi-cellular organisms.

How do tissues and organs work together in multi-cellular organisms?