Where is the hypodermis not found?

• A. In very thin areas such as eyelids, genitals, nipples, and shins
• B. In the back
• C. In the chest
• D. In the palms and soles

Answer: (D)

The hypodermis (subcutaneous tissue) sits beneath the dermis and is mainly loose connective tissue and fat that cushions and insulates, while anchoring the skin to underlying structures. In areas of very thick skin, like the palms and soles, there isn’t a distinct, well-developed hypodermal fat layer. Instead, the skin is tightly bound to deep fascia (the palmar or plantar fascia) and dense connective tissue under the dermis takes over, giving the skin its firm, grippy quality. That’s why a separate hypodermis isn’t present as a clear layer in these regions.

In thinner-skin areas, subcutaneous tissue is more modest, so the layer isn’t as prominent, which can make the presence of a distinct hypodermis seem less obvious there—but the key point for the question is that palms and soles lack a separate hypodermis due to their specialized thick skin and direct connection to deeper structures.