Which layer of skin is primarily responsible for sensitivity?

The dermis is the layer of skin primarily responsible for sensitivity due to its composition and the presence of various structures. This layer contains a rich supply of nerve endings, which are vital for the sensation of touch, pain, and temperature. Additionally, the dermis houses blood vessels, hair follicles, and connective tissue, all contributing to the skin's overall sensory functions.

The epidermis, while important for protection and providing a barrier, lacks the necessary structures for sensitivity that are found in the dermis. The hypodermis is a deeper layer primarily composed of fat and connective tissue, serving as insulation and cushioning, rather than as a site for sensory perception. The basal layer, located at the bottom of the epidermis, is primarily involved in producing new skin cells and does not contain the sensory receptors that are abundant in the dermis. Thus, the dermis stands out as the primary layer responsible for sensitivity in the skin.