DERMIS

Houses blood supply Anchors epidermis in place Two layers: Papillary Layer Reticular Layer

PAPILLARY LAYER

Most superficial layer of the dermis

PAPILLARY LAYER

Consists of loose connective tissue

PAPILLARY LAYER

Collagen fibers anchor dermis and epidermis together

DERMAL PAPILLAE

Found on the surface of the papillary layer 

DERMAL PAPILLAE

Houses tiny blood vessels called capillaries

DERMAL PAPILLAE

Houses sensory receptors called Tactile (Meissner) corpuscles

RETICULAR LAYER

Deepest and thickest layer of the dermis

RETICULAR LAYER

Consists of dense irregular connective tissue

RETICULAR LAYER

Collagen fibers that strengthen the dermis

RETICULAR LAYER

Elastic fibers that allow skin to revert after stretching

RETICULAR LAYER

Proteoglycans that hydrate the skin

RETICULAR LAYER

Blood vessels and accessory structures (hair, sweat glands, sebaceous glands)

RETICULAR LAYER

Sensory receptors, such as Pacinian (lamellated) corpuscles that respond to changes in pressure and vibration

SKIN MARKINGS

Interactions between the dermis and epidermis are shown on the skin as small lines called

DERMAL RIDGES

Thick collagen fibers arrange the dermal papillae into

EPIDERMAL RIDGES

The epidermis will blend in with the dermal papillae that lies underneath, creating

EPIDERMAL RIDGES

 Functions to increases gripping ability of hands and feet.

FINGERPRINT

Tiny sweat pores open along the ridges to form a thin film called a

FLEXURE LINE

As the reticular layer tightly fixes to deeper structures of the skin, this creates a deep crease called a

TENSION LINES

Gaps found in between bundles of collagen will indent to form cleavage lines, also known as

CAROTENE & HEMOGLOBIN

There are two other pigments that contribute to skin color

CAROTENE

Gives yellow-orange pigment

CAROTENE

Lipid-soluble molecule

CAROTENE

Usually ingested in diet from yellow and orange foods

CAROTENE

Accumulates in stratum corneum

HEMOGLOBIN

Gives skin a pinkish hue

HEMOGLOBIN

Protein found in red blood cells that binds and transports oxygen

HEMOGLOBIN

Turns a bright-orange red color when oxidized

Erythema

Pallor

Cyanosis

Blood circulating through the skin

MELANIN

Polymer mode of tyrosine amino acids

MELANIN

yellow, brown or black pigments

MOLES

are produced when a high amount of melanocytes are proliferated in one spot.

FRECKLES

are are produced when pigment is concentrated in one spot from a high amount of melanin production.

ALBINISM

is when melanocytes fail to produce the tyrosinase enzyme. This lack of skin pigmentation can increase the risk of DNA damage of keratinocytes.