Prokaryote The prokaryotes are a group of organisms whose cells lack a cell nucleus.

Eukaryote A eukaryote is an organism whose cells contain complex structures enclosed within membranes.

Organelle Tiny structures that carry out functions necessary for the cell to stay alive

Nucleus Control center of the cell

Ribosome small organelles that make proteins

Cytoplasm region between the cell membrane and the nucleus

Vacuole an organelle that stores food, water, and other materials needed by the cell

Lysosome contain substances that break down large food particles into smaller ones

Chloroplast A structure in the cells of plants and some other organisms that captures energy from sunlight and uses it to produce food.

Mitochondria organelles that convert the chemical energy stored in food into compounds that are more convenient for the cell to use

Cilia and Flagella

Chlorophyll Chlorophyll is a green pigment found in cyanobacteria and the chloroplasts of algae and plants.

Cell Wall A rigid structure that surrounds the cells of plants and most bacteria

Plasma Membrane thin, flexible barrier around a cell; regulates what enters and leaves the cell

Microfilaments/Microtubules Microfilaments or actin filaments are the thinnest filaments of the cytoskeleton, a structure found in the cytoplasm of eukaryotic cells. Microtubules are a component of the cytoskeleton, found throughout the cytoplasm. These tubular polymers of tubulin can grow as long as 25 micrometres

Golgi Apparatus receives proteins and other newly formed materials from the ER, packages them, and distributes them to other parts of the cell or to the outside of the cell

Endoplasmic Reticulum network of membranes within a cell's cytoplasm that produces a variety of substances

Chromatin contains information for directing a cell's activities

Centrioles A centriole is a cylinder shaped cell structure found in most eukaryotic cells, though it is absent in higher plants and most fungi.