Chapter 3: Integumentary System

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What 4 important functions does the integumentary system serve?

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What 4 important functions does the integumentary system serve?

  • it acts as a two way protective barrier

  • it regulates temperature

  • it houses sensory receptors

  • it secretes important fluids

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Organs of the Integumentary System include:

  • skin

  • hair

  • nails

  • sebaceous glands

  • sweat glands

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albin/o

white

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cauter/o

to burn

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corpor/o

body

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cry/o

cold

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cutane/o

skin

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derm/o, dermat/o

skin

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diaphor/o

profuse sweating

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electr/o

electricity

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erythr/o

red

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hindr/o

sweat

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ichthy/o

scaly/dry

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kerat/o

hard, horny

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leuk/o

white

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lip/o

fat

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melan/o

black

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myc/o

fungus

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necr/o

death

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onych/o

nail

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pedicul/o

lice

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phot/o

light

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py/o

pus

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rhytid/o

wrinkle

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sarc/o

flesh

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scler/o

hard

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seb/o

oil

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system/o

system

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trich/o

hair

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ungu/o

nail

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vesic/o

bladder

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xer/o

dry

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-derma

skin condition

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allo-

other, different from usual

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xeno-

foreign

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the skin is the ___ organ in the body weighing more than 20 pounds

largest

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the skin is also called the ___ and the ___ membrane

integument, cutaneous

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the skin provides constant ___ to the body

protection

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the skin forms a 2-way barrier that keeps ___, and ___ substances out

pathogens, harmful

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the skin keeps ___ body fluids in

critical

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the skin also protects the ____ ____, and ___

internal organs, tissues

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sensory receptors are in the ___ layer of the skin

middle

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sensory receptors detect a dumber of sensations including:

  • temperature

  • pain

  • touch

  • pressure

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sweat ___ off the skin and creates a cooling effect

evaporates

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sebaceous glands produce an oil called ___

sebum

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sebum lubricates the skin and keeps it from becoming too ___

dry

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___ blood vessels dilate to release heat through the skin

superficial

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to conserve hear; superficial blood vessels ___ to prevent heat escaping through the skin

constrict

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to conserve heat; subcutaneous layer serves as ___

insulation

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The skin consists of 2 layers: the ____ is the thin outer membrane layer

epidermis

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The skin consists of 2 layers: the ___ is the middle fibrous connective tissue layer

dermis

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the ___ layer is an important layer of fatty tissue below the skin

subcutaneous

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the epidermis is composed of ___ ____ ____

stratified squamous epithelium

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stratified squamous epithelium are ___ and scale-like cells

flat

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stratified squamous epithelium are arranged in overlapping layers called ___

strata

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the epidermis has no ___ supply or ___ tissue

blood, connective

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the ___ layer is the deepest layer of the epidermis; in this layer, cells, continuously grow and push old cells toward the surface; During this process, cells that are being pushed up shrink, die, and fill with keratin

basal

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___ cells overlap and allow the skin to act as a waterproof barrier

keratinized

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the basal layer also contains ____; produce the black pigment melanin that gives skin its color; protects the skin against UV rays of the sun

melanocytes

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the ___ or corium is the deeper layer of skin; located between the epidermis and subcutaneous layer; a living tissue with a good blood supply; made of connective tissue and collagen fibers that give it strength

dermis

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ridges formed in the dermis creates unique ___

fingerprints

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a number of ___ are housed in the dermis including: hair follicles, sweat and sebaceous glands, blood and lymph vessels, sensory receptors and nerve fibers, muscle fibers

structures

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the subcutaneous layer or ___ lies beneath the skin; it is composed of fat cells called ___ ; it protects the deeper tissues of body and acts as insulation against heat and cold

hypodermis, lipocytes

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the hair is an ___ organ that consists of the follicle, root, shaft, and arrector pili muscle

accessory

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hair grows as older, ___ cells are forced upward by new cells

keratinized

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the hair arrector pili muscle contracts to make the hair ___ stand up

shaft

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the main part of the nail is a flat plate of keratin called the nail ___

body

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the nail body is connected to the underlying tissue by the nail ___

bed

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the ___ is at the base of the nail

lunula

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nail grows from the nail root which is covered by the ___

cuticle

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the ___ ___ is the exposed part that must be trimmed

free edge

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sebaceous glands release sebum directly into ___ ___

hair follicles

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sebum lubricates hair and skin and prevents ___ and ___

drying and crackling

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sebaceous secretions increase during _____, leading to acne

adolescence

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secretions ___ with age, contributing to wrinkles and dry skin

decrease

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sweat glands or _____ glands are coiled glands in the dermis

sudoiferous

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sweat travels to the surface via a sweat ___ and exits to the surface via a sweat ___

duct, pore

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most sweat is colorless and odorless, but sweat from ___ glands produces body odor

apocrine

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albin/o

white

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angi/o

vessel

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bas/o

the base

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chem/o

chemical

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outer layer

cortic/o

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cold

cry/o

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skin

cutane/o

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cell

cyt/o

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skin

derm/o, dermat/o

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profuse sweating

diaphor/o

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electricity

electr/o

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red

erythr/o

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feeling

esthesi/o

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blood

hem/o

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sweat

hidr/o

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scaly, dry

ichthy/o

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hard, horny

kerat/o

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white

leuk/o

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fat

lip/o

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black

melan/o

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fungus

myc/o

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