The basic structural and functional unit of life is the cell. As a building is constructed with several bricks, the body of an organism is made up of numerous cells. Cells may vary widely in shape and size. There are about 200 different types of specializes cells in the human body. All groups of cells which have the same origin, structure and function are called the tissues. For example: epithelial tissue, connective tissue, muscle tissue and nerve tissue.
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Animal Tissues Quiz
Human biology quiz
Multiple Choice on Animal Tissues
Quiz on Animal Tissues