Organelle

From Freepedia

Image:Biological cell.png In cell biology, an organelle is one of several structures with specialized functions, suspended in the cytoplasm of a eukaryotic cell. Organelles were historically identified through the use of microscopy, and were also identified through the use of cell fractionation.

A few large organelles probably originated from endosymbiont bacteria:

• chloroplast
• Other plastids, such as leucoplasts, amyloplasts, Etioplasts, Elaioplast, rhodoplasts, leukoplasts, and chromoplasts.
• mitochondrion

Other organelles include:

• acrosome
• centriole
• endoplasmic reticulum
• golgi apparatus
• lysosome
• myofibril
• nucleus
• peroxisome
• ribosome
• vacuole
• vesicle
• melanosome
• cilium/flagellum
• parenthesome

Other related structures:

• cytosol
• endomembrane system
• nucleosome
• microtubule
• cell membrane

See also

• Cell
• Endosymbiotic theory.

Organelles of the cell
Chloroplast | Mitochondrion | Centriole | Endoplasmic reticulum | Golgi apparatus | Lysosome | Myofibril | Nucleus | Peroxisome | Ribosome | Vacuole | Vesicle