Definitions
Layer of Dermis below papillary layer
Reticular Layer
disease caused by abnormal cells in the body dividing uncontrollably
Outer Layer of Skin made of Stratified Squamous Epithelium
Epidermis
Arises from keratinocytes of stratum spinosum
Squamous Cell Carcinoma
Sebaceous glands overproduce sebum, which gets clogged in the hair follicle, along with dead, keratinized cells
Blackheads
is a protein that provides structure and strength
Happens when adipose tissue in the hypodermis fills with fat and pushes up through the mesh of collagen and elastin fibers
Cellulite
subcutaneous layer) - deep to (underneath) dermis
Not part of the skin
Connective tissue that anchors skin to underlying organs
Composed mostly of adipose (fat-storing) tissue
Hypodermis
Least malignant
Most common type
Arises from stratum basale
Basal Cell Carcinoma
Capillaries in the dermis dilate (get bigger, open up) so that excess heat carried by the blood can dissipate into the environment
This happens when you???
Sweat
Smooth muscle around root of hair
In order to generate heat when the body is cold, the arrector pili muscles contract all at once, causing the hair to "stand up straight" on the skin.
Arrector Pilli
colors skin, hair and the iris of the eyes
Melanocytes
Occurs only in thick skin (palms of hands and soles of feet)
Stratum Lucidum
Usually develops from a mole
Usually present as asymmetrical brown and/or black patches with uneven borders and a raised surface
Melanoma
Scale-like modifications of the epidermis
Heavily keratinized
Stratum basale extends beneath
Responsible for growth
Lack of pigment makes them colorless
Nails
Embedded in stratum basale
Specialized touch receptors
Merkel Cells
__________a population of abnormal cells that do not die when they should
_________ tumor - relatively harmless, abnormal cells will not spread to other parts of the body
___________ tumor - harmful tumors
Cells can mobilize and establish tumors in other organs of the body (metastasize)
Tumor -
Benign tumor -
Malignant tumor -
Cells undergoing mitosis
Cell division
Lies next to dermis
Stratum Basale
One in ________ Americans will experience some type of skin cancer in their lifetime
Five
Eccrine vs Apocrine
Eccrine
Open via ducts to pore on skin surface
Apocrine
Ducts empty into hair follicles
Destroys entire skin layer, including nerve endings
Burn is gray-white or black
Ex: being burned in a fire
Third Degree Burns
Produce oil (sebum)
Lubricant for skin
Kills bacteria
Prevents water los
Sebaceous Glands
Made of loose connective tissue
- Fibers of collagen and elastin create a loose mesh
Papillary Layer
How to Detect Melanoma
ABCDE Rule
A=
B=
C=
D=
E
A = Asymmetry
Two sides of pigmented mole do not match
B = Borders
Borders of mole are not smooth
C = Color
Different colors in pigmented area
D = Diameter
Spot is larger than 6 mm in diameter
E= Evolving
3 Virus caused by Skin Homeostatic Imbalances
1. Athletes Foot
2. Boils
3. Cold Sores