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Animal cells and plant cells can form tissues, such as muscle tissue in animals. A living tissue is made from a group of cells with a similar structure and function, which all work together to do a particular job. Here are some examples of tissues: 1  muscle.  the lining of the intestine.
B. Our body is the sum of its smaller parts. The following is a list of the 4 levels of organization in we humans. 1) Tissues (The 4 types are- epithelial, connective, muscle, nervous) are an aggregation of cells and extracellular substances functioning for a specialized activity. 2) Various types of tissues can combine to form functional units called organs, (like th heart, kidneys and brain)