Animal cells are characterized by their unique structure and function, which vary depending on their specific type. Skin cells, also known as epithelial cells, provide a protective barrier against physical and chemical damage, as well as regulating the movement of substances in and out of the body. Muscle cells, on the other hand, are responsible for generating force and movement, allowing for bodily functions such as walking and breathing. Nerve cells, or neurons, transmit electrical signals throughout the body, enabling communication and coordination between different organs and systems. Blood cells, including red blood cells, white blood cells, and platelets, play crucial roles in transporting oxygen, fighting infections, and...