Levels of Organisation 0.0 / 5 ? BiologyCells, tissues and organsIGCSEEdexcel Created by: meredithreganCreated on: 04-07-20 04:23 Levels of organisation Cells -> tissues -> organs -> organ systems -> organism 1 of 7 Organelles Components in cells that do specific jobs e.g chloroplasts that carry out photosynthesis or mitochondria that carry out respiration. 2 of 7 Cells The smallest functioning unit of a living organism. e.g red blood cells that carry around oxygen to other cells 3 of 7 Multicellular Most organisms are multicellular, which means they are made out of many cells 4 of 7 Tissue A group of the same or similar cells which work together to do a job. e.g muscle tissue where muscle cells work together to bring movement in animals 5 of 7 Organs A group of tissues which work together to do a particular job. e.g the heart which pumps blood and is made of three tissues (blood, muscle, nerves) 6 of 7 Organ system A group of organs working together to do a particular job. e.g the circulatory system (made of the heart and blood vessels) 7 of 7
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