The Integumentary System pt2

A thin zone of areolar connective tissue in and near the dermal papillae.

Allows for the mobility of leukocytes and other defense cells.

Rich in small blood vessels.

Papillary Layer

The deeper, thicker layer of the dermis.

Composed of dense irregular connective tissue.

Contains stretch marks (striae) which are tears in the collagen fibers.

Damage to dermal blood vessels can cause blisters between the dermis and epidermis.

Reticular Layer

Bluish color due to oxygen deficiency.

Cyanosis

Redness due to increased blood flow

Erythema

Paleness due to decreased blood flow

Pallor

Genetic lack of melanin, resulting in white skin and hair

Albinism

Yellowing of the skin and sclera due to excess bilirubin in the blood, often indicating liver dysfunction

Jaundice

Bruising; clotted blood under the skin.

Hematoma

Unique patterns on fingertips (fingerprints) that enhance grip and sensitivity. Formed during fetal development and remain unchanged.

Friction Ridges

Lines on flexor surfaces of digits, palms, wrists, and elbows where the skin folds during joint flexion.

Flexion Lines

A flat, melanized patch

Freckle

An elevated, melanized patch; may have hair. Should be monitored for changes

Nevus

Benign tumors of dermal capillaries causing discolored patches

Hemangiomas

Primarily dead, keratinized cells. Hair and nails are composed of tough, hard keratin

Composition

Slender filaments of keratinized cells growing from hair follicles

Pili