Skin anatomy 2 Flashcards
What is the anatomy of a hair
Hair follicle located in the dermis, hair shaft protrudes through epidermis made from dead keratinized cells
What are the parts of hair
Arrector pillus muscle- contacts to give goose bumps
Root hair plexus - Heightened sensation due to nerve collection
Sebasous glands - releases an oil substance sebum
- Natural moisteriser
What is sheep sebum used and what can be caused when sebasous glands over produce
Lanolin = sheep sebum in skin care
overproduction of sebum + infection = acne
What are the two forms of sweat glands
Eccrine
Apocrine
What does an Eccrine gland do
- Release water for themo regulation
- Located all over the body
- minor anti bacterial
What does an apocrine gland do
- Release a stick/ oil substance to hair folicle base
- Located in armpits, groin etc
- can cause odour
What is the function of nails
- protection
- heightened sensation
- Deformation = sensation
What are the 5 impacts of aging skin
Thinner epidermis + dermis
Bad temp regulation = less sweat
Dried skin = low sebum
Slow to repair
less pigment = lighter skin + grey hairs
What are the effects of smoking and vaping
Acellerated skin aging, damages collagen + elastin
Cause contact dermititis
reduces blood flow
What causes skin pigmentation, and release process
melanin - block UV
melaninocytes produce melonin released to epidermis via melanosomes - melenosomes can be shed
What causes a mole and freckles
Moles are caused by an over proliferation of melenocytes
Freckles are cuased by an over secretion of melenosomes
Why is viatamine D important
what does it prevent
To regulate Ca2+ production through calcetriol
- importnat to prevent rickets
What are the two types of skin cancer
Basale cell carcenoma
melignat melanoma
define basale cell carcenoma
Originates in the stratum basale
relativly benign
spread is rare
define melignment melanoma
Highly metastatic (moves lots)
Deeper in the skin = greater fataity
origonates in melenocytes
