Outer boundary of the cell, which regulates what enters and exits the cell. It is selectively permeable.

Cell membrane

This is the jelly-like fluid matrix within the cell

Cytoplasm

The organelle that releases energy from stored food molecules

mitochondrion

Site of protein synthesis (where proteins are made)

Ribosome

Structures within the cell that perform specialized functions

organelles

Controls all cell activities, especially growth and reproduction

nucleus

Porous double membrane that separates the nucleus from the cytoplasmNuclear envelope

Network of protein filaments that helps the cell to maintain its shapecytoskeleton

Genetic material that is found in the nucleus of a nondividing cell

Chromatin

Compact form of DNA and protein in the nucleus of a cell about to divideChromosome

Set of tubular passageways involved with the transport of proteins; it has many ribosomes attached and connects the nucleus to the cell membraneRough endoplasmic reticulum

Non-living layer that surrounds a plant cell and provides protection and supportCell wall

Tubular structures found only in animal cells that are involved in cell divisionCentrioles

Storage sacs that store food, water, salts and other materials

Vacuoles

Stack of flattened membranes that processes and packages proteins to be secreted out of the cellGolgi apparatus

Organelles that contain powerful digestive enzymes that break down substances to be used by the cell as well as toxic materials

Lysosome

Site of photosynthesis in the plant cell

Chloroplast

Tubular passageways that have few or no ribosomes attached and is the site of lipid synthesis

Smooth endoplasmic reticulum

Tail-like structure found in prokaryotes and some animal cells; used for cell movementflagella