Human skin is a complex organ primarily composed of the epidermis, dermis, and subcutaneous (hypodermal) layers, making this statement a matter of basic anatomical fact requiring no citation.
The claim states that human skin is primarily composed of epidermal, dermal, and subcutaneous tissue layers. This is a foundational, standard anatomical description of human skin that is taught universally and represents common knowledge by everyday observation and basic biology. Therefore, no citation is needed and the balance verdict is common knowledge.