Chapter 5 - Integumentary Flashcards Preview

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Flashcards in Chapter 5 - Integumentary Deck (38)
1

subcutaneous layer

not part of the skin
deep to the dermis

2

epidermis

of skin
the thinner portion
apical
composed of keratinized stratified squamous epithelium

3

lamellated corpucle

encapsulated nerve endings sensitive to pressure
found in the subcutaneous layer of skin

4

the intergumentary system is made up of organs such as the:

Skin
Blood vessels
Nerves
Accessory structures (hair, nails, and skin glands)

5

How may layers are there in the skin?

4 layers in regular skin
5 in thick skin

6

Langerhans cells

arise from red bone marrow and migrate to the epidermis
become immune cells

7

Merkel cells

located in the deepest layer
touch sensation

8

List the layers of the skin

Epidermis
Dermis
subcutaneous
superficial fascia

9

List the 4 types of specialized cells of stratified squamous epithelium

keratinocytes
melanocytes
langerhans cells
Merkel Discs

10

melanocytes

produce melanin a yellow-red or brown black pigment that absorbs damaging UV radiation

11

Keratinocytes

Make up 90% of cell types
contain keratin - waterproofing

12

List the layers of the epidermis from most deep to superficial

stratum Basale
stratum spinosum
stratum granulosum
stratum lucidum
stratum corneum

13

Stratum basale

deepest layer of the epidermis
single row of cuboidal or columnar keratinocytes
some are stem cells
contain a few melanocytes and merkel discs

14

stratum spinosum

fit tightly together
provides strength and flexibility
contain melanocytes and langerhans cells

15

stratum granulosum

granulos = little grains
undergoing apoptosis
in the keratinocytes are lamellar granules: waterproofing and lipid rich
beginning of superficial strata

16

stratum lucidum

only on thick skin - palms of hand, sole of feet
contain large amount of keratinocytes

17

stratum corneum

cells horn shaped
continuously replced and shed

18

Which type or keratinocytes are only found in thick skin?

stratum lucidum

19

The dermis is composed of mainly _______________

connective tissue

20

embedded in the tissue of the demis are:

blood vessels
Nerves
glands
hair follicals

21

Papillary

superficial portion of the dermis
contains areolar connective tissue with elastic fibers
contains demal papillae that house capillaries, corpuscles of touch, and free nerve endings

22

reticular

deepest portion of the dermis
dense irregular connective tissue with bundles of collage and some elastic fibers
spaces between fibers contain some adipose cells, hair follicles, nerves, sebaceous glands, and sudoriferous glands

23

list the three pigments that make up the skins color

melanin
hemoglobin
carotene

24

melanin

pale yellow to red to tan to black.
2 forms of melanin pheomelanin (yellow to red) and eumelanin (brown to black),

25

which pigment is responsible for the blush of the skin

hemoglobin

26

which pigment is the yellow-orange pigment

carotene

27

What is the function of pili?

protection from injury, sun, foreign particles
decrease in heat loss
touch receptors

28

Hair bulb

base of the follicle (shaped like an onion)

29

Hair Follicle

– external and internal root sheaths
- extensions and connections of the epidermis

30

What is the purpose of the arrector pili muscle?

to make the hair stand up

31

Hair Root Plexuses

– bundles of neurons for light touch sensation

32

What are the three types of exocrine glands of the skin?
be able to label them on a diagram

sebaceous gland
sudoriferous gland
ceruminous gland

33

sebaceous glands
where are they found

simple, branched acinar glands
connected to hair follicles
found in lips, glans penis, labia minora, tarsal gland of eyelids

34

Where are sebaceous glands absent

palms and soles

35

Which gland secretes sebum

sebaceous glands

36

ceruminous glands
where are they found?

extrernal ear

37

which type of gland secretes cerumen

earwax
ceruminous glands

38

List the 6 functions of the skin?

temp control
blood reservior
protection
sensation
excretion
synthesis of vit D