The Integumentary System

A collection of vocabulary flashcards based on key concepts from the lecture notes on the integumentary system.

Integumentary System

The system consisting of skin, hair, nails, sweat glands, and sebaceous glands.

Epidermis

The superficial layer of the skin composed of epithelial tissue.

Dermis

The layer of skin underlying the epidermis, made of fibrous connective tissue.

Hypodermis

The subcutaneous layer beneath the skin primarily composed of adipose tissue.

Keratin

A fibrous protein forming the main structural constituent of hair, nails, and the outer layer of skin.

Melanocytes

Cells that produce melanin, which gives skin its color and protects against UV radiation.

Sebaceous Glands

Glands in the skin that secrete oil (sebum) to help prevent water loss and lubricate skin and hair.

Eccrine Sweat Glands

Sweat glands abundant on palms, soles, and forehead, important for thermoregulation.

Apocrine Sweat Glands

Sweat glands located in axillary and anogenital areas, secrete a thicker sweat that may contribute to body odor.

Friction Ridges

Epidermal ridges formed by the dermal papillae that enhance grip and contribute to fingerprints.

Cutaneous Sensations

Sensory perceptions that arise from receptors in the skin, responding to stimuli such as touch, pain, and temperature.

Homeostatic Imbalance

Alterations in skin color that can indicate underlying health issues.

Cyanosis

A bluish coloration of the skin due to low oxygenation of hemoglobin.

Erythema

Redness of the skin, often due to inflammation or infection.

Jaundice

A yellowing of the skin that may indicate liver dysfunction.

Nail Matrix

The tissue responsible for the growth of nails.

Arrector Pili

A small muscle attached to hair follicles that causes hair to stand up (goosebumps) when contracted.