English for doctors. Dermis (most important)

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English for doctors. Dermis (most important)

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5. Dermis

Dermis is a connective tissue layer of mesodermal origin subjacent the epidermis and its basement membrane. The dermis-epidermal junction, especially in thick skin, is characterized by numerous papillary interdigitations of the dermal connective tissue and epidermal epithelium. This increases the surface area of attachment and brings blood vessels in closer proximity to the epidermal cells. The epidemis, like epithelia in general, is devoid of blood vessel. Histologically, the dermis consists of two identifiable regions.

Papillary layer, associated principally with the dermal papillae, is the most superficial layer. It consists of a loosely packed, irregular meshwork of collagen fibrils that contain fine blood vessels and nerve endings.

The reticular layer is the deeper dermal layer and consists of coarse collagen bundles intertwined with elastic fibers in a gel matrix. This layer is a typical dense irregular connective tissue.

HYPODERMIS: this layer of loose vascular connective tissue is infiltrated with adipocytes and corresponds to the superficial fascia of gross anatomy. However, since it contains the deepest portions of the cutaneous glands and hairs, it is also an important part of the skin. The hypodermis fastens the skin to underlying muscles and other structures.

new words

dermis - dermis

connective - connecting

membrane - membrane

junction - connection

to be characterized by - be characterized by something

numerous - significant

to increase - increase

surface - the surface

area - area

epidermal - epidermal

thick - thick

skin - skin

papillary - papillary

devoid - to happen

meshwork - mesh network

coarse - rude

bundle - bundle

interwine - to intertwine

bring - bring

to consists of - consist of

to contain - contain

collagen - collagen

adipocyte - fat cell

Author: Elena Belikova

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