The document describes the major organelles found in animal and plant cells. It discusses the nucleus, which contains DNA and controls cell activities, and the nuclear envelope, which surrounds the nucleus. It also mentions the endoplasmic reticulum, Golgi apparatus, mitochondria, lysosomes, chloroplasts, and cell wall. Each organelle has a specific function, such as producing proteins, modifying and transporting molecules, generating energy, breaking down waste, or photosynthesis.