The document discusses the parts and functions of cells as well as levels of organization. It lists the major cell organelles including the cell wall, cell membrane, nucleus, cytoplasm, endoplasmic reticulum, ribosomes, mitochondria, chloroplasts, Golgi bodies, vacuoles, and lysosomes. It provides brief descriptions of the functions of each organelle, such as the cell wall providing structure, the cell membrane acting as a filter, the nucleus controlling the cell, mitochondria providing energy, and chloroplasts facilitating photosynthesis. It also notes the five levels of organization from simplest to most complex as: atoms, molecules, organelles, cells, tissues/organs/organ systems.