WHAT ARE CELL ORGANELLES? Every cell has a membrane around it to keep its own contents separate from the external environment. Large and complex cells, including cells from multicellular organisms,
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ENDOPLASMIC RETICULUM The endoplasmic reticulum (ER) is a large network of membrane-bound tubes and sheets. It looks like long tubules or round or oblong bags (vesicles). The ER membrane is similar
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GOLGI APPARATUS The Golgi apparatus, first described by Camillo Golgi, consists of a system of membrane-bound vesicles (flattened sacs) arranged approximately parallel to each other in stacks calle
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LYSOSOMES Structurally, lysosomes are membrane-bound sacs filled with digestive enzymes. These enzymes are made by RER. L ysosomes are a kind of waste disposal system of the cell. These help to kee
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MITOCHONDRIA Mitochondria are known as the powerhouses of the cell. Mitochondria have two membrane coverings. The outer membrane is porous while the inner membrane is deeply folded. These folds inc
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PLASTIDS AND VACUOLES Plastids Plastids are present only in plant cells. There are two types of plastids – chromoplasts (coloured plastids) and leucoplasts (white or colourless plastids).&
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