INTEGUMENTARY SYSTEM Flashcards
Skin condition due to infected sebaceous glands
Acne
Genetic disorder that affects the skin, in which there is no melanin production
Albinism
Active phase of the hair growth cycle
Anagen
Type of sweat gland that is associated with hair follicles in the armpits and genital regions
Apocrine sweat gland
Smooth muscle that is activated in response to external stimuli that pull on hair follicles and make the hair “stand up”
Arrector pili
Type of stem cell found in the stratum basale and in the hair matrix that continually undergoes cell division, producing the keratinocytes of the epidermis
Basal cell
Cancer that originates from basal cells in the epidermis of the skin
Basal cell carcinoma
Sore on the skin that develops when regions of the body start necrotizing due to constant pressure & lack of blood supply; also called decubitis ulcers
Bedsore
Thickened area of the skin that arises due to constant abrasion
Callus
Transitional phase marking the end of the anagen phase of the hair growth cycle
Catagen
Type of callus that is named for its shape & the elliptical motion of the abrasive force
Corn
In hair, the second or middle layer of keratinocytes originating from the hair Matrix, as seen in a cross- section of the hair bulb
Cortex
In hair, the outermost layer of keratinocytes originating from the hair matrix, as seen in a cross-section of the hair bulb
Cuticle
(Plural=dermal papillae) extension of the papillary layer of the dermis that increases surface contact between the epidermis & dermis
Dermal papilla
Layer of skin between the epidermis & hypodermis, composed mainly of connective tissue & containing blood vessels, hair follicles, sweat glands & other structures
Dermis
Structure that forms an impermeable junction between cells
Desmosome
Type of sweat gland that is common throughout the skin surface; it produces a hypotonic sweat for thermoregulation
Eccrine sweat gland
Skin condition due to an allergic reaction. Which resembles a rash
Eczema
Fibers made of the Protein elastin that increase the elasticity of the dermis
Elastin fibers
Clear protein-bound lipid found in the stratum lucidity that is derived from keratohyalin and helps to prevent water loss
Eleiden
Outermost tissue layer of the skin
Epidermis
Nail field that meets the proximal end of the nail body. Also called the cuticle
Eponychium
Outer layer of the hair follicle that is an extension of the epidermis, which encloses the hair root
External root sheath
Superficial burn that injures only the epidermis
First-degree burn
Burn in which full thickness of the skin and underlying muscle & bone is damaged
Fourth-degree burn
Layer of connective tissue that surrounds the base of the hair follicle, connecting to the dermis
Glassy membrane
Keratinous filament growing out of the epidermis
Hair
Structure at the base of the hair root that surrounds the dermal papilla
Hair bulb
Cavity or sac from which hair originates
Hair follicle
Layer of basal cells from which a strand of hair grows
Hair matrix
Mass of connective tissue, blood capillaries, & nerve endings at the base of the hair follicle
Hair papilla
Part of hair that is below the epidermis anchored to the follicle
Hair root
Part of hair that is above the epidermis but is not anchored to the follicle
Hair shaft
Connective tissue connecting the integument to the underlying bone & muscle
Hypodermis
Thickened layer of stratum corneum that lies below the free edge of the nail
Hyponychium
Skin and it’s accessory structures
Integumentary system
Innermost layer of keratinocytes in the hair follicle that surround the hair root up to the hair shaft
Internal root sheath
Type of scar that has layers raised above the skin surface
Keloid
Type of structural Protein that gives skin, hair, & nails it’s hard, water-resistant properties
Keratin
Cell that produces keratin and is the most predominant type of xell found in the epidermis
Keratinocyte
Granulated Protein found in the stratum granulosum
Keratohyalin
Specialized dendritic cell found in the stratum spinosum that functions as a macrophage
Langerhans cell
Basal part of the nail body that consist of a crescent-shaped layer of thick epithelium
Lunula
In hair, the innermost layer of keratinocytes originating from the hair matrix
Medulla
(Also,tactile corpuscle) receptor in the skin that respo ds to light touch
Meissner corpuscle
Pigment that determines the color of hair & skin
Melanin
Cell found in the stratum basal of the epidermis that produces the pigment melanin
Melanocyte
Type of skin cancer that originates from the melanocytes of the skin
Melanoma
Intercellular vehicle that transfers melanin from melanocytes into keratinocytes of the epidermis
Melanosome
Receptor cell in the stratum basal of the epidermis that responds to the sense of touch
Merkel cell
Spread of cancer cells from a source to other parts of the body
Metastasis
Layer of epidermis upon which the nail body forms
Nail bed
Main keratinous plate that forms the nail
Nail body
Fold of epithelium that extends over the nail bed, also called the eponychium
Nail cuticle
Fold of epithelium at that extend over the sides of the nail body, holding it in place
Nail fold
Part of the nail that is lodged deep in the epidermis from which the nail grows
Nail root
(Also, lamellated corpuscle) receptor in the skin that responds to vibration
Painting corpuscle
Superficial layer of the dermis, made of loose, areolar connective tissue
Papillary layer
Deeper layer of the dermis; it has a reticulated appearance due to the presence of abundant collagen and elastin fibers
Reticular layer
Disease in children caused by vitamin D deficiency, which leads to the weakness of bones
Rickets
Collagen-rich skin formed after the process of wound healing that is different from normal skin
Scar
Type of oil gland found in the dermis all over the body & helps to lubricate & waterproof the skin & hair by secreting sebum
Sebaceous gland
Oily substance that is composed of a mixture of lipids that lubricates the skin & hair
Sebum
Partial-thuckness burn that injures the epidermis & a portion of the dermis
Second-degree burn
Type of skin cancer that originates from the stratum spinosum of the epidermis
Squamous cell carcinoma
Deepest layer of the epidermis, made of epidermal stem cells
Stratum basale
Most superficial layer of the epidermis
Stratum corneum
Layer of epidermis superficial to the stratum spinosum
Stratum granulosum
Layer of epidermis between the stratum granulosum & stratum corneum, found only in thick skin covering the palms, soles of the feet & digits
Stratum lucidum
Layer of the epidermis superficial to the stratum basale, characterized by the presence of desmosomes
Stratum spinosum
Mark formed on the ski. Due to a sudden growth spurt & expansion of the dermis beyond its elastic limits
Stretch mark
Sweat gland
Sudoriferous gland
Resting phase of the hair growth cycle initiated with catahen & terminated by the beginning of a new anagen phase of hair growth
Telogen
Burn that penetrates & destroys the full thickness of the skin (epidermis & dermis)
Third-degree burn
Compond that aids absorption of calcium & phosphates in the intestine to improve bone health
Vitamin D
Skin condition in which melanocytes in certain areas lose the ability to produce melanin, possibly due an autoimmune reaction that leads to loss of color in patches
Vitiligo