Which of the following is NOT a layer of the skin? Epidermis Hypodermis Mesodermis Dermis

The correct answer is C. Mesodermis.<br /><br />The skin is composed of three main layers: the epidermis, dermis, and hypodermis. The epidermis is the outermost layer, which provides a protective barrier and is responsible for the production of new skin cells. The dermis is the middle layer, which contains blood vessels, nerves, and connective tissue. The hypodermis, also known as the subcutaneous layer, is the innermost layer, which provides insulation and cushioning for the skin.<br /><br />The mesodermis is not a layer of the skin. It is a term used to describe a specific layer of embryonic tissue that gives rise to various structures, including the muscles, bones, and connective tissues.