Chapter 10 - Physiology & Histology Of The Skin⭐️ Flashcards
Where are melanocytes located?
Germinativum
Where are basal cells located?
Germinativum
Where are keratin cells located?
Granulosum
What are the layers of the skin
Stratum corneum Stratum lucidum Stratum granulosum Stratum spinosum Stratum germinativum
What makes up the stratum corneum
Made of corneocytes (hardened keratin
What makes up the stratum lucidum
Small, clear cells
Contains palms and soles of feet
What makes up the stratum granulosum
Produces keratin and intercellular lipids
Contains enzymes that dissolve desmosomes
What makes up the stratum spinosum
Enzymes that create lipids and protein
Contain cells that turn into desmosomes
Contain Langerhans Immune Cells and T-Cells
What makes up the stratum germinativum
Contain basal cells, Merkel cells, and melanocytes
Everything in the epidermis starts here
What is in the dermis
Blood, lymph, capillaries, follicles, sebaceous glands, sweat glands, sensory nerves, and the arrector pili are all in the dermis. 70 percent of the dermis is collagen
What makes up the papillary layer
Connects the dermis to the epidermis using dermal papillae
Comprises 10 to 20 percent of the dermis
Collagen and elastin are more widely spaced here
What makes up the reticular layer
Denser, deeper layer of the dermis
Comprised mostly of collagen and elastin
What makes up the hypodermis/ subcutaneous
Contain adipose tissue 80 percent fat The tissue in this layer creates a protective cushion that gives the body contour and smoothness Also provides energy This layer decreases and thins with age
What are appendages of the skin
Hair and nails
What layer of the skin does mitosis take place in
Germinativum
