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Cells (Organelles (Little organs) (Ribosomes (Dense particles, Consists of…
Cells
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Nucleus
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If a cell has a larger than usual amount of cytoplasm to regulate, it could have more than one nucleus (multinucleate)
Major Components
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Nucleus
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Contains the fluids nucleoplasm, nucleoli, and chromatin
Endocytosis
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Phagocytosis
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Phagocytes engulf entire cells or cell debris, something large, can be a pathogen, such as bacteria
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Cell Cycle
Interphase
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Divided into G1, S, and G2 subphrases
"G1" Phase
Cells are metabolically active and are actively making proteins, growing vigorously
"S" Phase
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DNA replicates itself in order that the two daughter cells receive identical copies of the genetic material
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Cell Division
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Some cells reproduce slowly (ex. liver cells), but can divide quickly if the organ is damaged
Nervous tissue cells and skeletal muscle are unable to divide after they fully mature, but repair is carried out by scar tissue