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Cell Specialization • Not all cells are alike (structure or function) • Many different, types, sizes, shapes – Our body has over 200 different cell types • Most are only 10-20micrometers in diameter • Meaning we need a microscope to see them • Cell Specialization: all cells are made for a different job in an organism Cell Specializaiton • Skin Cells: layered/stacked for protection & renewal Cell Specialization Cell Specialization Cell Specialization Cell Communication Cell Organization • Cells Tissues Organs Organ Systems Body Organization • Tissue: A group of similar cells that perform a particular function • Organ: similar tissues of body which carry out 1+ similar functions • Organ system: work together to perform a specific function.