2a) Levels Of Organisations

describe the levels of organisation within organisms: organelles, cells, tissues, organs and systems.

Organelles-Any of a number of organized or specialized structures within a living cell-eg mitochondria

cell-The smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane

Tissue-A group of similar cells that perform a common function-eg muscles

organ-A collection of tissues that carry out a specialized function of the body-liver

organ system-An individual animal, plants or single-celled life form

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