Which skin layer lies beneath the epidermis and provides structural support and houses nerves and vessels?

• A. Epidermis
• B. Hypodermis
• C. Dermis
• D. Subcutaneous

Answer: (C)

The layer directly under the epidermis is the dermis. This layer provides structural support for the skin through dense connective tissue rich in collagen and elastic fibers, giving skin its strength and elasticity. It also houses blood vessels and nerve endings, which supply nutrients to the outer epidermis and enable sense of touch and temperature. The dermis contains hair follicles, sweat glands, and sebaceous glands, as well as specialized sensory receptors. It has two subregions: a papillary layer with loose connective tissue and dermal papillae that interlock with the epidermis, and a deeper reticular layer with dense irregular connective tissue that adds strength. The layer beneath the dermis is the hypodermis (subcutaneous layer), composed mostly of adipose tissue, which anchors the skin to underlying structures and provides insulation and energy storage. The epidermis is avascular, which is why it relies on the dermis for nutrients.