Unit 3 Integumentary System Vocabulary

Vocabulary flashcards for Unit 3 Integumentary System.

Acne

Skin condition due to infected sebaceous glands

Apocrine sweat gland

Type of sweat gland that is associated with hair follicles in the armpits and genital regions

Arrector pili

Smooth muscle that is activated in response to external stimuli that pull on hair follicles and make the hair “stand up”

Basal cell carcinoma

Cancer that originates from basal cells in the epidermis of the skin

Dermis

Layer of skin between the epidermis and hypodermis, composed mainly of connective tissue and containing blood vessels, hair follicles, sweat glands, and other structures

Desmosome

Structure that forms an impermeable junction between cells

Eccrine sweat gland

Type of sweat gland that is common throughout the skin surface; it produces a hypotonic sweat for thermoregulation

Epidermis

Outermost tissue layer of the skin

First-degree burn

Superficial burn that injures only the epidermis

Fourth-degree burn

Burn in which full thickness of the skin and underlying muscle and bone is damaged

Hair shaft

Part of hair that is above the epidermis but is not anchored to the follicle

Hypodermis

Connective tissue connecting the integument to the underlying bone and muscle

Keratin

Type of structural protein that gives skin, hair, and nails its hard, water-resistant properties

Medulla

In hair, the innermost layer of keratinocytes originating from the hair matrix

Melanin

Pigment that determines the color of hair and skin

Melanoma

Type of skin cancer that originates from the melanocytes of the skin

Papillary layer

Superficial layer of the dermis, made of loose, areolar connective tissue

Reticular layer

Deeper layer of the dermis; it has a reticulated appearance due to the presence of abundant collagen and elastin fibers

Sebaceous gland

Type of oil gland found in the dermis all over the body and helps to lubricate and waterproof the skin and hair by secreting sebum

Sebum

Oily substance that is composed of a mixture of lipids that lubricates the skin and hair

Second-degree burn

Partial-thickness burn that injures the epidermis and a portion of the dermis

Third-degree burn

Burn that penetrates and destroys the full thickness of the skin (epidermis and dermis)