Levels of Organisation in an Organism 0.0 / 5 ? BiologyIGCSEEdexcel Created by: Lucy SCreated on: 29-03-13 16:12 Organelle Membrane-bound structure found in the cytoplasm of a cell which carries out particular functions in the cell. Eg. mitochondria. 1 of 6 Cell The basic unit of all living organisms. Eg. muscle cell. 2 of 6 Tissue A group of similar cells. Eg. muscle tissue. 3 of 6 Organ A group of different tissues working together to carry out a particular function in the body. Eg. heart. 4 of 6 Organ System A group of organs working together to carry out a particular function in the body. Eg. blood circulatory system. 5 of 6 Organism A living thing made up of different organ systems. Eg. human. 6 of 6
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