Introduction to Cells and Tissues

The video tutorial explains that all living organisms, including humans and fish, are made of cells. It contrasts simple organisms like amoebas with the complex human body, which contains trillions of specialized cells. The tutorial introduces the four main types of tissues in the human body: muscle, connective, nerve, and epithelial. It then focuses on the skeletal system, composed of connective tissue, and the muscular system, primarily made of muscle tissue.

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