write about animal cell
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Animal Cell Structure. Animal cells are typical of the eukaryotic cell, enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles. Unlike the eukaryotic cells of plants and fungi, animal cells do not have a cell wall.
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Animal cells :
- The cell walls are absent in animal cells.
- They are not always in a definite form.
- They are smaller in size.
- They can often change its shape.
- They can often change its position also.
- They lack plastids.
- They lack chlorophyll.
- They contain small vacuoles or lack them.
- The nucleus lies in the centre.
- The nucleus is in round shape.
- The mitochondria are numerous.
- Animal cell burst open when placed in hypotonic solution as it does not possess cell wall.
- It may not burst open sometimes when they possess contractile vacuoles.
- The centrioles are found in animal cells.
- The lysosomes are also present.
- They lack glyoxysomes.
- They reserve food in the form of glycogen and fat.
- The adjacent cells are connected through cell junctions.
- Cytokinesis takes place by cleavage.
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