The Dermis as Part of the Integumentary System

Yes. The integumentary system comprises the skin (epidermis, dermis, hypodermis) and its accessory structures: hair, nails, sweat glands, and sebaceous glands.

The dermis is the dense connective tissue layer beneath the epidermis, containing collagen, elastin, vasculature, nerves, and adnexal structures. It is an integral component of the integumentary system.