Cells and cell theory.

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Presentation transcript:

Cells and cell theory

What do all these things have in common?

Cells vs No Cells

Cells vs No Cells

Cell Theory All living things are made of cells Cells come from other cells Cells are the smallest unit of structure and function Structure = how something is built Function = how something works

Level of organization When cells work together to do the same function, they form tissues When tissues work together, they form organs When organs work together, they form organ systems Organ systems work together to form organisms

Example: levels of organization Organization level Example Cell Blood cell, skin cell, nerve cell Tissue Connective, Nerve, Muscular, Epithelial Organ Skin, stomach, heart Organ system Circulatory, digestive, respiratory Organism Human, cat, dog, plant, fungi