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The four basic tissues of the body are indeed epithelial, connective, muscle, and nervous.

Epithelial tissue serves as a protective layer covering the body and its organs, as well as lining cavities and forming glands. It plays critical roles in absorption, secretion, and sensation.

Connective tissue provides support and structure to the body, connecting different tissues and organs. It includes a wide variety of types, such as bone, cartilage, blood, and adipose tissue, each serving unique functions.

Muscle tissue is responsible for movement, with three main types: skeletal (voluntary movement), cardiac (heart muscle), and smooth (involuntary movements in organs).

Nervous tissue makes up the brain, spinal cord, and nerves, facilitating communication within the body through the transmission of electrical signals.

By recognizing these four fundamental tissue types, one can understand how they work together to form organs and systems essential for maintaining the body's functions.