Integumentary System

Protection

The function of the integumentary system that acts as a barrier against physical abrasions, UV radiation, dehydration, and microbial invasion.

Sensation

The function of the integumentary system that involves sensory receptors that detect stimuli such as heat, cold, touch, pressure, and pain.

Temperature Regulation

The process by which blood flow and sweat glands maintain body temperature by dissipating heat or conserving warmth.

Excretion

The elimination of waste products through the skin and gland secretions, contributing to detoxification.

Vitamin D Production

The synthesis of a precursor to vitamin D in the skin upon UV exposure, vital for calcium absorption.

Epidermis

The outermost layer of skin, composed mainly of keratinized stratified squamous epithelium.

Dermis

The deeper layer of skin made of dense irregular connective tissue, providing structural strength.

Melanin

A pigment produced by melanocytes that protects against UV radiation and varies in amount based on genetic and environmental factors.

Carotene

A yellow pigment from dietary sources that can accumulate in the skin, influencing its color appearance when consumed in high amounts.

Sebaceous Glands

Glands that produce sebum, which lubricates skin and hair and prevents dryness.

Eccrine Glands

The most common type of sweat gland, found throughout the skin, primarily responsible for regulating body temperature.

Apocrine Glands

Sweat glands located in specific areas such as the armpits and genitalia, becoming active at puberty and producing thicker secretions.

Hair Follicle

Structure from which hair grows, extending into the dermis, with the hair bulb being the site of production.

Nail Matrix

The area of the nail where new cells are produced, leading to nail growth.

Keratinization Process

The transformation of keratinocytes as they migrate from the basal layer to the surface, undergoing changes and eventual death.

Stratum Corneum

The outermost layer of the epidermis, made up of dead cells that provide a barrier against the environment.

Collagen and Elastin

Fibers in the dermis that provide strength and elasticity, essential for skin resilience.

Arrector Pili Muscle

Smooth muscle attached to hair follicles that causes hair to stand upright in response to cold or fear.

Nail Disorders

Various conditions that can affect nail health, including fungal infections and trauma.