organelles

Nucleus

Control center of the cell that contains genetic material (DNA).

Nuclear Envelope

A double membrane that holds genetic material in one area and separates the nucleus from the cytoplasm.

Nucleolus

Site within the nucleus where ribosomes are assembled.

Plasma Membrane

Barrier for cell contents consisting of a double phospholipid layer that regulates selective permeability.

Cytoplasm

The material outside the nucleus and inside the plasma membrane where most cellular activities occur.

Mitochondria

Organelles known as the powerhouses of the cell that produce ATP through cellular respiration.

Ribosomes

Sites of protein synthesis made of protein and RNA.

Endoplasmic Reticulum (ER)

Fluid-filled tubules for carrying substances; can be rough (with ribosomes) or smooth (without ribosomes).

Golgi Apparatus

Modifies and packages proteins into vesicles for transport.

Lysosomes

Organelles that digest worn-out or nonusable materials within the cell.

Peroxisomes

Membranous sacs that detoxify harmful substances and break down free radicals.

Cytoskeleton

A network of protein structures that provides the cell with an internal framework.

Centrioles

Rod-shaped bodies made of microtubules that direct the formation of the mitotic spindle during cell division.