Chapter 6 INTEGUMENTARY SYSTEM

Question 1

where is the integumentary system found? provide examples?

Answer 1

covers body
skin
accessary tissues
EX: nails, hair ,skin,sweat glands, sebaceous glands

Question 2

integument?

Answer 2

skin

Question 3

dermatology

Answer 3

study of skin

Question 4

Layers of skin ?

Answer 4

1. Epidermis- epithelial
2. dermis-deeper layer
3. subcutaneous layer(hypodermis)-NOT PART OF INTEGUMENTARY SYSTEM
   deep to dermis

Question 5

Epidermis epithelium of the integument?

Answer 5

5 layers(strata) of integument
1. startum corneum
2. stratum lucidum
3.stratum granulosum
4,stratum spinosum
5. stratum basale

Question 6

Keratinized, stratifies squamous epithelial

Answer 6

the 5 layers of the skin

Question 7

LETS GET SUN BURNED

Answer 7

first 3 layers are composed of living keratinocytes

Question 8

keratinocytes

Answer 8

make up 90 percents of epidermis

Question 9

Three cell types in stratum basale

Answer 9

keratinocytes- in all layers
melanocytes- produce and store pigment
tactile cells- Merkel cells

Question 10

Stratum spinosum

Answer 10

8-10 layers
have desmones

Question 11

startum granulosum

Answer 11

3-5 layers of keratinocytes
keratinocytes begin keratinization

Question 12

startum lucidum

Answer 12

found only in thick skin
palms and soles

cells filled with eleidin- product of keratin maturation

Question 13

stratum corneum

Answer 13

20-30 layers of dead skin
anucleate (no nucleus), keratinized cells

Question 14

anucleate

Answer 14

a- nu -cleate( a- no nucleus)

Question 15

Variations in epidermis?

Answer 15

thick skin-palms , feet
have sweat glands
NO HAIR FOLLICLE

thin skin-
most of body ( except palms and feet)lacks stratum lucidum layer ( thats only in thibk skin)

Question 16

Melanin?

Answer 16

2 melanin shades
Eumelanin- brown , black shades

pheomelanin-lighter shades tan, yellow red

Question 17

phenomelanin

Answer 17

lighter shades,
tan
yellow
red

Question 18

Eumelanin?

Answer 18

drake shades
brown
black

Question 19

Dermis layers?

Answer 19

2 regions
1. superficial papillary
2.deeper reticular layers

Question 20

subcutaneous layer(hypodermis)

Answer 20

NOT PART OF INTEGUMENTARY

function- protect, store energy, insulation

Question 21

irFunctions of integumentary system

Answer 21

8 functions
1.protect from external envir.
2. prevent water loss
3. vit d synthesis
4.secretion
5.absorption
6.immune function
7.temperature regulation
8.sensory reception

Question 22

3 zones hair length

Answer 22

hair bulb
root
shaft

Question 23

Arrector pili

Answer 23

extends hair follicle to demal papillae
elevates hair with contraction
goosebumps

Question 24

hair function?

Answer 24

functions
protection- sunburn & injury
heat retension
sensory reception
visual identification

Question 25

types of sweat glands?

Answer 25

2 types
Merocrine - contain sweat duct
Apocrine- contain sweat duct

Question 26

Merocrine (eccrine) sweat glands

Answer 26

function- secrete sweat
Major role- thermoregulation

Question 27

Apocrine sweat glands

Answer 27

Produce exocytosis( secretion) into
hair follicles in axillae
nipples
pubic and anal region

produce odor due to bacteria

Question 28

Sebaceous glands examples ?

Answer 28

Holocrine glands- produce sebum

Question 29

NAIL STRUCTURES

Answer 29

free edge
nail body
nail root
nail bed

Question 30

Repair and regeneration of integumentary system

Answer 30

2 types Regeneration or Fibrosis

Regeneration
-replace damageed or dead cells
-restores organ function

Fibrosis
-gap filled with scar tissue
-fibroblast produces collagen
function activities not restored

Question 31

Stages of wound healing

Answer 31

4 stages
1. cut blood vessels bleed in wound
2.blood clot forms temp. barier
3.blood vessels-re-grow granulation tissue forms
4.epithelium regenerates & ct fibrosis occurs