A group of cells having same structure and performing same function forms tissue. A group of tissues performing a particular function in the body forms an organ. A group of organs that work together to maintain a stable internal environment and perform a particular function is called as organ system.
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There are 4 basic types of tissue: connective tissue, epithelial tissue, muscle tissue, and nervous tissue. Connective tissue supports other tissues and binds them together (bone, blood, and lymph tissues). Epithelial tissue provides a covering (skin, the linings of the various passages inside the body).
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Answer:
A group of cells having same structure and performing same function forms tissue. A group of tissues performing a particular function in the body forms an organ. A group of organs that work together to maintain a stable internal environment and perform a particular function is called as organ system.