Skin, Skeletal, and Muscular Systems: Muscles in the Body

The video explains that all humans have the same number of muscles, which vary in size. It describes the muscular system's role in movement, blood circulation, and digestion. Three muscle types are detailed: skeletal (voluntary and striated), smooth (involuntary, found in organs), and cardiac (involuntary, heart-specific). Skeletal muscles are attached to bones by tendons, while smooth muscles are in organ walls. Cardiac muscle is unique to the heart, working tirelessly throughout life.

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