Chapter 5; Bio 210 (Integumentary System) Flashcards
Direction of Cell Movement in the Integumentary System
Basale (deep- Spinosum Granulosum Lucidum Corneum (superficial)
Cutaneous Membrane
Epidermis and Dermis
Integumentary System compose of
Integument
Hair
Nails
Exocrine Glands (oil sweat)
Epidermis
stratified squamous
- avascular
- innervated
Thick Skin
palms and soles of feet (5 Layers) has LUCIDUM
Thin Skin
hair folecule typically evident (4 Layers) no lucidum
Melanocyte
determines hair color (located in bulb of follicle)
Arrector Pilli
smooth muscle in each hair follicile
Sebaceous Glands
produce sebum (oil)
Eccrine (sweat) Glands
coiled tubular glands
Carotene
yellow pigment that can accumulate in the stratus corneum
Cleavage Lines
lines in the skin that go different directions (dense irregular tissue)
Jaundice
malfunction of liver and bile can’t be excreted, may accumulate in skin.
Pituitary Malfunction
tumors cause secretions of MSH (Melanocyte stimulating hormone) darkens the skin.
Layers of Skin:
Stratum Corneum Stratum Lucidum Stratum Granulosum Stratum Spinosum Stratum Basale
Melanin
responsible for skin color
Stratum Corneum
most superficial layer of the epidermis (protein envelope and protection by keratin)
- dead squamous cells
- cornified cells (dead cells)
Stratum Lucidum
3 to 5 layers thick of dead cells
-appears transparent (thick skin)
Stratum Granulosum
2 to 5 layers of flat diamons shaped cells that
-release lipids
Stratum Spinosum
8 to 10 layers of many-sided cells
-produces keratin fibers
Stratum Basale
single layer of cuboidal or columnar cells
-basement membrane that attaches to the dermis
-produce melanocytes
protect against UV light
Dermal Papilla
little humps that shape the phalange print
Melanin
determines skin color by the rate of production of melaninocytes NOT how many.
As a species we have about the same number of melanocytes
Calcitirol
essential for normal absorption of Ca and P
Rickets
form in bones from insufficient amount of vitamin D
Dermis: Paillary layer
(20% of dermis) loose and areolar tissue
- contains small capillaries
- contains dermal papillae
Dermis: Reticular Layer
(80% of dermis) dense irregular connective tissue
-larger vessels
Sensory structure in epidermis
Merkel cells
Sensory structures in dermis
Meissner and Pacinian corpuscle
Pesudorifris glands
sweat glands (NOT sebum, not oil)
Holocrine
destorys and lysis
Merocrine
exocytosis
Apocrine
pinching off
Merocrine sweat glands
most of the body
-palms of the hands, coiled tubular
Apocrine sweat glands
armpits and nipples that break down and cause odors
Thermoregulation
helps maintain homeostasis that works with cardiovascular system
Fibrosis
formation of scar tissue
Ceruminous Glands
produces earwax
modified eccrine gland
