What major structure is found in the dermis?

The dermis is a key layer of the skin located beneath the epidermis, and it plays a critical role in providing strength, elasticity, and support. One of the major structures found in the dermis is blood vessels. These vessels are essential for delivering oxygen and nutrients to the skin cells, aiding in the regulation of body temperature, and facilitating waste removal. They also play a role in inflammatory responses and healing processes when injuries occur.

In contrast, fat cells are primarily found in the subcutaneous layer, which lies beneath the dermis, and they serve to insulate the body and store energy. Keratinocytes and melanocytes, while important, are predominantly located in the epidermis, with keratinocytes being the main cell type that forms the outer protective barrier of the skin and melanocytes responsible for producing the pigment melanin, which provides skin color and protects against UV radiation. Thus, blood vessels are indeed a major feature of the dermal structure, underscoring the layer's importance in maintaining skin health and functionality.