-
The two parts of the skin
Epidermis and Dermis
-
Epidermis
outer layer of the skin-thin
-
Dermis
Inner layer of the sun-thick
-
Layers of the Epidermis (outer layer)
- Basale (basal layer)
- Spinosum (Spiny layer)
- Granulosum (Granular layer)
- Lucidium (Clear layer)
- Corneum (Horny layer)
-
Which layer of the epidermis is always making cells
Basal layer
-
Which layer of the empidermis is "thick skin" and not everyone has it
Lucidium (clear layer)
-
Four types of skin cells
- Keratinocytes
- Melanocytes
- Langerhans
- Merkel
-
Keratinocytes
Produce keratin (top most layer of the skin)
-
Melanocytes
Produces melanin
-
Langerhans cells
Antigen presenting cells (immune cells)
-
Merkel Cells
Mechanoreceptors (feels, senses, touch)
-
Layers of the Dermis
Papillary layer and Reticular layer
-
Papillary Layer
- Very thin layer, forms finger prints.
- Ripped papillary layers results in strech marks
-
Reticular layer
The larger layer, finbers in certain order, lines of cleavage
-
Cutaneous glands
- Also called Skin Glands
- Located in the Dermis
-
The three types of cutaneous glands
- Sebum (Sebaceous) glands-oil
- Odorous (Apocine) glands-odor
- Sweat (Merocine) glands-sweat
-
Epidermal would healing
- No scare
- Only epidermis damanged
-
Deep wong healing
- Went into dermis
- if cut is against the grain it will cause a scare
-
Four funtcions of the skin
- Protection
- Sensation
- Excretion
- Thermoregulation
-
Two parts of the brain that sense temp
-
-
Heat promoting mechanisms
- Vasoconstriction of blood vessels
- Metabolic rate increases
- Shivering
- Enhanced thyroxin release
-
Heat loss mechanisms
- Vasodilatation of blood vessels
- Enhanced sweating
-
The three pigments of the skin
- Melanin
- Carotene
- Hemoaglobin
-
Mealnin
- Yellow to reddish-brown to black pigment
- Responsible for dark skin colors
-
Carotene
- Yellow to orange pigment
- Most obvious in the pamls and soles of the feet
-
Hemoglobin
- Reddish pigment
- Responsible for the pinkish hue of the skin
-
1st degree burn
Epidermis burned
-
2nd degree burn
Epidermis burned and Dermis injured
-
3rd degree burn
All layers burned
-
Basal cell carcinoma
volcano shaped
-
Squammous cell carcinoma
- Isolated island
- Small islands
-
-
Ectoderm
Layer of the fetus that forms the epidermis
-
Mesoderm
Layer of the fetus that forms the dermis and hypodermis
-
Lanugo
Downy coat of delicate hairs covering the fetus
-
Vernix Caseosa
Substance produced by sebaceous glands that protects the skin of the fetus in the amnion
|
|
