the integumentary system
DESCRIPTION
The Integumentary System. Chapter 5. Introduction. The integumentary system consists of hair, skin, and nails. Skin accounts for approximately 7% of total body weight (9-11 lbs) and varies in thickness (1.5 mm to 4.0 mm). Skin is composed of two distinct regions. LAYERS OF SKIN. - PowerPoint PPT PresentationTRANSCRIPT
The Integumentary The Integumentary SystemSystem
Chapter 5Chapter 5
IntroductionIntroduction
The integumentary system consists of The integumentary system consists of hair, skin, and nails.hair, skin, and nails.
Skin accounts for approximately 7% of Skin accounts for approximately 7% of total body weight (9-11 lbs) and varies in total body weight (9-11 lbs) and varies in thickness (1.5 mm to 4.0 mm).thickness (1.5 mm to 4.0 mm).
Skin is composed of two distinct regions.Skin is composed of two distinct regions.
LAYERS OF SKINLAYERS OF SKIN
SKIN FUNCTIONSSKIN FUNCTIONS
ProtectionProtection Body temperature regulationBody temperature regulation Cutaneous sensationCutaneous sensation Metabolic functionsMetabolic functions Blood reservoirBlood reservoir Excretion of wastesExcretion of wastes
EPIDERMISEPIDERMIS
Cell TypesCell Types KeratinocytesKeratinocytes MelanocytesMelanocytes Langerhans’ cellsLangerhans’ cells Merkel cellsMerkel cells
EPIDERMISEPIDERMIS
LayersLayers Stratum basaleStratum basale Stratum spinosumStratum spinosum Stratum Stratum
granulosumgranulosum Stratum lucidumStratum lucidum Stratum corneumStratum corneum
DERMISDERMIS Underlies the epidermisUnderlies the epidermis
Composed of two layersComposed of two layers Papillary layer= areolar loose connective Papillary layer= areolar loose connective
tissuetissue Reticular layer= dense irregular Reticular layer= dense irregular
connective tissue (80%)connective tissue (80%)
Contains many nerve endingsContains many nerve endings
DERMISDERMIS
Review QuestionReview Question
What is the name of the inner-most What is the name of the inner-most layer of the epidermis?layer of the epidermis?
a. Hypodermisa. Hypodermis
b. Stratum basaleb. Stratum basale
c. Stratum corneumc. Stratum corneum
d. Dermisd. Dermis
e. Stratum lucidume. Stratum lucidum
Review QuestionReview Question
Which layer of the dermis contains Which layer of the dermis contains dense regular connective tissue?dense regular connective tissue?
a. Hypodermisa. Hypodermis
b. Papillary layerb. Papillary layer
c. Reticular layerc. Reticular layer
d. Stratum spinosumd. Stratum spinosum
e. Stratum granulosume. Stratum granulosum
SKIN PIGMENTATIONSKIN PIGMENTATION
MelaninMelanin
CaroteneCarotene
HemoglobinHemoglobin
ACCESSORY OGRANSACCESSORY OGRANS
Sweat glandsSweat glands EccrineEccrine ApocrineApocrine CeruminousCeruminous MammaryMammary
Sebaceous Sebaceous glandsglands
ACCESSORY ORGANSACCESSORY ORGANS
ACCESSORY ORGANSACCESSORY ORGANS
Review QuestionReview Question
Which of the following refers to a modified Which of the following refers to a modified sweat gland found in the external auditory sweat gland found in the external auditory meatus where it produces wax?meatus where it produces wax?
a. Apocrine glanda. Apocrine gland
b. Eccrine glandb. Eccrine gland
c. Sebaceous glandc. Sebaceous gland
d. Ceruminous glandd. Ceruminous gland
e. Mammary glande. Mammary gland
Review QuestionReview Question
Which of the following terms refers to the Which of the following terms refers to the cuticle of the nail?cuticle of the nail?
a. Eponychiuma. Eponychium
b. Hyponychiumb. Hyponychium
c. Lunulac. Lunula
d. Matrixd. Matrix
e. Roote. Root
SKIN DISORDERSSKIN DISORDERS
Skin cancerSkin cancer
SKIN CANCERSSKIN CANCERS
Skin Cancer Video
SKIN DISORDERSSKIN DISORDERS
Skin cancerSkin cancer BurnsBurns
SKIN DISORDERSSKIN DISORDERS
Rule of NinesRule of Nines
SKIN DISORDERSSKIN DISORDERS
Skin cancerSkin cancer BurnsBurns RosaceaRosacea
ROSACEAROSACEA
SKIN DISORDERSSKIN DISORDERS
Skin cancerSkin cancer BurnsBurns RosaceaRosacea DermatitisDermatitis Contact dermatitisContact dermatitis AcneAcne JaundiceJaundice
SeborrheaSeborrhea HirsutismHirsutism AlopeciaAlopecia ImpetigoImpetigo PsoriasisPsoriasis AlbinismAlbinism StriaeStriae