Integumentary System Flashcards
What organs does the Integumentary system?
Skin, hair, nails, sebaceous gland, sudoriferous glands, ceruminous glands, hair follicles, apocrine sweat glands, and eccrine sweat glands
What are the different skin layers?
Epidermis, Dermis, Hypodermis/subcutaneous layer
What is the epidermis (on the OUTSIDE) made up of?
dead cells
What kind of cells produce and distribute melanin?
Melanocytes
What is the inside of the epidermis made up of?
Inner layer of cells
What does the dermis contain?
collagen, blood vessels, glands, hair follicles, and nerve endings
What are the functions of the integumentary system?
Protection, Excretion, and interaction with the environment
How does the integumentary system protect the body?
Provides barrier between the body and outside pathogens, Prevents body from drying out, Divides quickly, pushing older cells towards the surface (Create a tough, waterproof outer surface), Melanocytes in the epidermis produce melanin (protects the body from ultraviolet radiation
How does excretion work?
Water, minerals (sodium chloride, magnesium) are excreted by glands
How does the integumentary system interact with the environment?
Contains sensory nerve endings that allow the body to detect: Touch, Change in temperature, pain. Skin also produces vitamin D when UV lights hit the skin
Example of homeostasis in the integumentary system is
Body temperature– too hot, produces sweat (blood vessels dilate). too cold, blood vessels constrict, less blood is carried to the skin surface
Integumentary system
An organ system comprised of skin and its associated organs
Excretion
Elimination of metabolic waste from the body
Homeostasis
The maintenance of a constant internal environment
Sebaceous Glands
Accessory structures originating in the dermis that secrete sebum onto hair emerging from the hair follicle
Ceruminous glands
Accessory structures that produce ear wax. They are found only in the dermis of the ear canal
Hair follicles
Tubes arising from the dermis surrounded by invaginations of epithelial tissue, from which hair growth occurs
Apocrine Sweat gland
Accessory structures of the dermis that are in physical association with hair follicles, producing a secretion with an odor (possibly a sex pheromone to humans)
Eccrine Sweat glands
Accessory structures originating throughout the dermis of the human body that secrete sweat, used primarily for regulation of body temperature
Epidermis
The outer layer of the skin
Dermis
The middle layer of skin
Subcutaneous
Under the dermis
Hypodermis
The deepest layer of the skin
Vitamin D
A vitamin made by the skin that helps the intestine absorb dietary calcium
Cutaneous Vasoconstriction
A decrease in the diameter of blood vessels in the dermis that reduces blood flow through the skin
