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36 terms

The Epidermis and the skin

The Epidermis chapter 5
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The layers of the Epidermis from most superficial to deepest
Stratum Corneum
Straitum Lucidium (only in thick skin)
Stratum Granulosum
sratum Spinosum
Stratum Basel(Basment layer)
What is another name for the skin?
cutaneous membrane
Which of the following is not an accessory of the skin?Hair,Nails,Various glands,Muscles,nerves,merkel disc.
Merkel Disc are not part of the skin.
The functions of the skin are tempature regulation,water repellent,barrier to the external enviornment,sensory information,synathesis of Vitaman D and it protects underlying tissue from....
Uv radiation
name the layers of the skin in order
EPIdermis(note epi means above,top)
dermis,hypodermis(note: hypo means below)
The hypodermis is
the layer underneath the dermis,layer of adipose tissue, anchors to the dermis.
Thin skin covers all parts of the body except for ?
palms of hands and soles of feet
thick skin lacks
hair an sebacous glands
The Epidermis is _______skin
thin
The _______muscle when contracted causes what to stand on end
Arrectorpili
Where is the Arrector pilli muscle present?
It is present in thin skin
Sudorrirferous Glands are more numerous in the________skin
Skin
The sudorriferous glands are_______glands
sweat
Sebecous gland secrerte....
oil
There are four principal types of cells in the epidermis, three of them are (no specific order
Keratinocytes
Melanocytes
Langerhuans cells
and what is the other kind?
Merkel cells
The cell that is most numerous and is arranged in 4-5 layers produces keratin
Keratinocytes
These glands work as waterproof sealents
Lameller glands
Pigment that blocks UV radiation is known as
Melanin
All people produce the same amount of melanin, so why are some people darker skinned than others?
Because their body produces it at a faster pace
This cell praticipates in immunity and is a small fraction of the epidermal cells
Langerhuans
Single row of cuboital or coloumnar keratinocytes some of which are stem cells
Stratum basel
Stratum spinosum contains how many layers of tightly packed and many sided keratinocytes
8-10 layers
The stratum lucidium contains
3-5 layers of clear flat and dead keratinocytes
The stratum Corneum contains how many layers of dead flat keratinocytes
25-30
The dermis has 3 types of cells they are
fibroblast macrophages and adipocytes
Between fibers of the reticular region are....
hair follicles,sebaceous glands(also known as oil glands),nerves, and suderiferous glands(sweat glands)
Straight lines or loops caused by epidermis projecting into the dermis
epidermal ridges
Melanin carotene hemoglobin
are the 3 main pigment producing molecules
with out _____and carotine skin appears translusent
melanin
Blond hair and red hair have melanin vareints with more iron and
sulfar
Hiar that has no bubbles or melanin will be
white
The main function of the eccerine glands is
thermoregulation or( tempature reguation)
Deep wound healing occurs in four phases they are
Inflammatory
Migratory
proliferative
maturation
In which phase of deep wound healing does a blood clot form loosely uniting wound edges
Inflammatory
in which phase of deep wound healing does the clot dry into a scab?
Migratory phase
In this phase of deep wound healing the scab come off
maturation