The document describes the main parts of animal cells including the cell membrane, endoplasmic reticulum, nucleus, ribosomes, Golgi bodies, mitochondria, lysosomes, nuclear membrane, and vacuole. It notes the functions of each part such as the cell membrane protecting the cell and the endoplasmic reticulum transporting materials. The document also indicates that plant cells contain chloroplasts and a cell wall, which animal cells do not.