Question

the dermis has two major layers. which layer constitutes 80% of the dermis and is responsible for the tension lines in the skin?
the papillary layer
the reticular layer
the hypodermal layer
the subcutaneous layer

Explanation:

The dermis has two main layers: the papillary layer (thin, upper part) and the reticular layer (thicker, lower part). The reticular layer makes up about 80% of the dermis. It has dense irregular connective tissue with collagen and elastic fibers. Tension lines (Langer's lines) in the skin are related to the orientation of collagen fibers in the reticular layer. The hypodermal (subcutaneous) layer is not part of the dermis.

Answer:

the reticular layer