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animal cell click to hear : animal cell

Smallest living structure and constituent unit of all animals, including human beings; its size and shape vary according to function.
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microtubule cilium microfilament peroxisome cell membrane chromatin nucleus ribosome endoplasmic reticulum mitochondrion cytoplasm vacuole lysosome nuclear envelope nucleolus centriole Golgi apparatus

microtubule click to hear : microtubule

Cylindrical structure supporting the cell and allowing organelles and substances inside the cell to move about.

cilium click to hear : cilium

Filament-like extension of the cytoplasmic membrane allowing the cell and certain substances on its surface to move about.

microfilament click to hear : microfilament

Rod-shaped structure supporting the cell and giving it its shape.

peroxisome click to hear : peroxisome

Organelle containing enzymes that neutralize the cell’s toxic substances.

cell membrane click to hear : cell membrane

The cell’s flexible outer casing; it separates the cell from the surrounding environment and works as a filter to control the entry and exit of certain substances.

chromatin click to hear : chromatin

Mass of very fine filaments of DNA, the genetic material of the cell; it is compressed into chromosomes during cell division.

nucleus click to hear : nucleus

Organelle containing a cell’s genes and controlling its activities.

ribosome click to hear : ribosome

Organelle, free or attached to the endoplasmic reticulum, producing proteins essential to the constitution and functioning of living beings.

endoplasmic reticulum click to hear : endoplasmic reticulum

Organelle formed of walls to which the ribosomes are attached.

mitochondrion click to hear : mitochondrion

Ovoid organelle that produces the energy necessary for cell activity.

cytoplasm click to hear : cytoplasm

Clear gelatinous substance surrounding the various cellular structures.

vacuole click to hear : vacuole

Spherical cavity containing water, waste and various substances required by the cell.

lysosome click to hear : lysosome

Small spheroid organ containing enzymes that break down food, spent cell components and other harmful substances that have been absorbed.

nuclear envelope click to hear : nuclear envelope

Envelope formed of two layers surrounding the nucleus and pierced with small holes, which allow exchanges between the cytoplasm and the nucleus.

nucleolus click to hear : nucleolus

Small spherical body located inside the nucleus, within which the ribosomes, or protein-synthesizing structures, are produced.

centriole click to hear : centriole

Structure consisting of small rods that play a major role in cell division. Each cell usually contains two.

Golgi apparatus click to hear : Golgi apparatus

Organelle composed of a series of pockets that receive proteins produced by the ribosomes and either transport them outside the cell or to other organelles.