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A & P I-Lab 4.1

The Cell: Anatomy and Divison-cyoplasmic Organelles

Ribosomes * Tiny spherical bodies composed of RNA and protein: * actual sites of protein synthesis: * Floating free or attached to a membranous structure in the cytoplasm.
Endoplasmic reticulum (ER) *membranous system of tubules that extends throughout the cytoplasm: two varieties ---rough ER is studded with Robosomes, wich provide area for storage and smooth ER, which has no function in protein synthesis.
Golgi apparatus Stack of flattened sacs with bulbous ends and associated small secicles: found close to the nucleus:plays a role in packaging proteins or other substances for export from the cell.
Lysosomes Various-sized membranous sacs containing digestive enzymes: Function is to digest worn-out cell organells and foreign substnces that enter the cell.
Peroxisomes Small lysosome-like membranous sacs conaining oxidase enzymes that detoxify harmful chemicals.
Mitcochondria "Powerhouses of the cell"..Rod shaped bodies that produce ENERGY or ATP
Centrioles Paired, cylindrical bodies lie at right angles to each other, close to the nucleus. For the bases of cilia and flagella
Cytoskeletal elelments: Microfilaments: Intermediate filaments: Microtubules: * Provide cellular support * Function in intracellular transport *Microfilament are formed largely of actin, a contractile protein. Intermediate filament are stable elements to composed of a variety of proteins and resist mechanical forces action on cel
Created by: doublewiggles