Nucleus
Structures that contain DNA and controls many of the cell's activities.
Cell Membrane
Structure that protects and supports the cell and regulates what enters and leaves the cell.
Cytoplasm
The fluid portion of the cell.
Organelle
Little organ" structures that have specialized functions in eukaryotic cells.
Vacuole
Saclike structures that store materials.
Lysosome
Structures filled with enzymes that break down macromolecules.
Cytoskeleton
Structures that provide the shape and internal organization of the cell.
Centriole
Structures in animal cells that help organize cell division.
Ribosome
Small particles of RNA and protein on which proteins are assembled using instructions from DNA.
Endoplasmic Reticulum
An internal membrane system where lipid components of cell membranes are made, along with proteins.
Golgi Apparatus
Stack of membranes that modifies, sorts, and packages proteins and other materials for storage or release.
Chloroplast
Structures that convert energy from sunlight into chemical energy that is stored in food.
Mitochondria
Structures that convert chemical energy stored in food into a form that can be easily used by the cell.
Nuclear envelope
Structures which allow materials to move into and out of the nucleus.
Vesicles
Small structures that move materials between cell organelles.