muscle cell A cell is a specialised unit with a unique structure. A tissue is a group of similar cells with the same function. An organ is a group of various tissues that work together to perform a common function. A system is made up of several organs that work together to perform a common function. An organism is the complete living thing, made up of all the systems. What are levels of organisation? Multicellular living things are made up of different types of cells. These cells carry out specialised functions. They work together at different levels, called levels of organisation. A cell in this system is… The muscular system includes all the muscles of the organism. muscle tissue A muscle is an organ. It is made up of different tissues, such as muscle tissue and tissues that surround the muscle. 8 ●●○ EXPLAIN the levels of organisation in a system of the human body. Follow the muscular system example. LEVELS OF ORGANISATION organism word bank cell organ organism system tissue 14 · f o u r t e e n
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