Histology of Skin Flashcards
What is the function of skin
Protection Sensory Thermoregulation - Fatty layer, sweat glands Metabolic - synthesise vitamin D Containment - prevent dehydration Sexual signalling
What are the layers of skin from deep to superficial
Stratum Spinosium
Stratum Granulosum
Stratum Licidem
Stratum Corneum
What does spinosiujm do
Prickle cell layer
Euchromatic Nucleus
Produce spiky desmosomal junctions
What does granulosum do
Produce lipid rich layer to prevent water loss + barrier against foreign material
In which type of skin is lucidem visible
Only visible in thick skin
What is corneum made of
Dead keratinized cells
What does the subcutaneous tissue have
Vascular system + adipose tissue
What is the difference between thick and thin skin
Thin skin is hairy
What is the function of melanocytes
Produce melanin which protects skin against UV radiation
What is the function of dendritic langerhams cells
Triggers immune response with microorganisms
What is the function of tactile merkel cells
Mechanoreceptors
What is the function of the Sebaceous Gland
Secrete sebum which keeps skin supple
What are the 2 types of sweat glands
Eccrine = sweat Apocrine = pheromones
What is hair made of
Elongated keratinized controlled by arrector pili muscle
What are nails made of
Hard and flexible plates of keratin
Nail plate arise from nail matrix
