(7) integumentary system Flashcards
integumentary system - basic functions
protection thermoregulation homeostasis sensory reception slow water loss
integumentary system - parts
hair
skin
nails
associated glands
integumentum
a covering
layers of the skin
epidermis
papillary layer
dermis
hypodermis/subcutaneous layer
epidermis
outermost layer
stratified squamous epithelial tissue
no blood vessels, nerves, receptors, etc
papillary layers
boundary between the epidermis & dermis
contributes to fingerprints & toeprints
contains melanocytes
skin color is influenced by
genes melanin levels oxygenation levels chemicals (ex. beta carotene) diseases/disorders
dermis
contains blood vessels, nerves, hair follicles, smooth muscle, connective tissue, and exocrine glands
exocrine gland
a structure that secretes substances into ducts that empty onto a free surface, or onto the body covering
types of exocrine glands
sweat sebaceous ceruminous mammary salivary lacrimal
sweat gland
help regulate body temperature
sebaceous gland
oil
surround hair shafts/follicles
protection (drying, irritation, keeps hair & skin pliable, inhibits fungal/bacterial growth)
ceruminous gland
wax
mammary gland
milk
salivary gland
saliva
lacrimal gland
tears
hair
protection
insulation
hair color depends on
genes and melanin
hair bulb makes
keratin
arector pili
mulse that makes the hair stand on end
nail parts
free edge nail plate/nail bed lunula cuticle matrix
free edge
the portion of the nail that extends beyond the nail bed
nail plate/nail bed
the area of the finger that the nail grows on top of
lunula
visible portion of the matrix bed where the nail is formed & grows
cuticle
fold of skin tissue at the base of the nail which overlaps the lunula and protects the nail bed
matrix
where the nail is formed & grows
nerves
interpret the environment
protection
thermal regulation
subcutaneous layer/hypodermis - contains
loose connective tissue
adipose tissue
sensory nerves
blood vessels
subcutaneous layer/hypodermis - functions
insulation
padding
thermoregulation
bind skin to muscle (connection)
most common forms of skin cancer
carcinoma
melanoma - the worst
types of burns
first degree
second degree
third degree
first degree burn
epidermis only - sunburn
second degree burn
epidermis and part dermis
fluid-filled blisters separate the 2 burned layers
heals without grafting, may scar
third degree burn
epidermis, dermis, part hypodermis, and structures
damaged area is numb due to loss of sensory neurons
consequences of severe burns
increased chances of infection nerve damage water loss scarring reduced ability to regulate body temp
