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