Flashcards in Integumentary System Deck (70):
Two or more types of tissues working together to perform a specialized function
What is the largest organ in the body by weight?
What makes up the integumentary system?
Skin and accessory organs
What are the functions of the integumentary system?
regulate body temperature, protective temperature, excrete wastes, slows water loss, houses sensory receptors
Close to the blood supply in the dermis, only stratum healthy enough to reproduce
What is the epidermis made of?
Stratified squamous epithelium
What does the epidermis lack?
How is the epidermis nourished?
blood vessels in dermis
Protects the underlying tissues and keep out disease-causing microorganisms
Cells located in the epidermis that produces melanin
a dark pigment that provides color in skin
What do differences in skin color result from?
amount and size of melanin, genetics, UV rays, x-rays, diet
Cancer that arise from epithelial cells
Cancer that arise from melanocytes
What is the most common skin cancer?
Functions to bind the epidermis to underlying tissues
what is the dermis composed of?
Collagen and elastin fibers
What does the dermis contain?
blood vessels, nerves, hair follicles, glands, touch receptors
What is the subcutaneous layer composed of?
loose connective tissues and insulating adipose tissue
Binds the skin to underlying organs
Protective coverings over the ends of fingers and toes
what are nails composed of?
stratified squamous epithelium overlying the nail bed
what happens as new nail cells are produced?
old cells are pushed outward and get keratinized
what is the most active growing region of the nail root?
a structure extending from the epidermal surface into the dermis
where are hair follicles located?
Gland that softens and lubricates the skin and hair
an active inflammation of the sebaceous glands
develop when a sebaceous gland is blocked by accumulated sebum
develop when blocked material oxidizes and dries
What are the 4 types of sweat glands?
eccrine, apocrine, ceruminous, mammary
Sweat gland found on forehead, neck and back
Sweat gland found on axillary region and groin area
Sweat gland lining of the external ear canal
what does the ceruminous gland secrete?
gland that secretes milk
Controls the internal body temperature; responds to sensory signals from the temperature receptors in the skin
What can happen if there are slight shifts in body temperature?
disrupt metabolic reactions in the body and can denature enzymes if the temperature is too high
Decrease in the diameter of blood vessels (less blood flow)
Increase in the diameter of blood vessels (more blood flow)
core body temperature is below 95 F
core body temperature is above 106 F
How does the epidermal layer heal wounds?
epithelial cells are stimulated to divide in order to fill in the gaps
How does the dermal and subcutaneous areas heal wounds?
Blood vessels break and blood clot forms. Dried blood and tissue create a scab
A burn that injures the epidermis
A burn that destroys the epidermis and dermis; blisters appear
A burn that destroys the epidermis, dermis, and accessory organs of the skin
How are 3rd degree burns treated?
skin transplant (skin graft)
Used to estimate the extent and severity of burns
rule of nines
What does the rule of nines help with?
Determines how to hydrate/ control infection
What happens if the nail matrix is destroyed?
Nails wont grow back
Enlarged end of the root of a hair
Layer of epidermis that is mitotic
Nerve receptor for two point descrimination located in the dermal papilla
Epidermal stratum that is found in thick skin (clear)
Nerve ends found in epidermis that detects pain
Lack of melanin
Process by which cytoplasm of a cell is replaced by keratin
Part of the root or a nail that has rapidly dividing cells
Type of skin with five epidermal layers found on soles of feet
Type of skin found on your lips
Undulating layer of dermis that causes fingerprints
Sweat glands that become active at puberty
What type of glands are sebaceous glands?
What is the ABCDE of skin cancer detection?
Asymmetrical, borders, color variability, diameter, evolution
Any change to a mole
A mole larger than the diameter of a pencil eraser
Color variations in the mole
Irregularities around the borders of the mole