Integumentary system Flashcards
(18 cards)
Epidermis
Outermost layer of the skin
Stratum basale
The deepest layer of the epidermis. Where new skin cells are made, skin color is generated, and the skin connects to underlying tissue
Stratum spinosum
Spiny, tough middle layer of the epidermis where keratinocytes begin producing keratin and immune cells help defend against pathogens
Desmosomes
Act like spot welds, keeping cells tightly connected
Stratum granulosum
Where skin cells begin to die and toughen up, producing keratin and waterproofing materials that protect your body from dehydration and outside harm
Stratum lucidum
Layer of dead skin cells found only in thick skin, where it adds strength and protection
Eleidin
Clear protein found in the stratum lucidum that helps strengthen skin and contributes to the glassy appearance
Stratum
Refers to a layer of tissue, especially when describing the epidermis
Stratum corneum
Outermost layer of dead skin cells, forming a waterproof, protective barrier that continuously renews itself
Keratinocytes (Epidermis cell)
The main job is to produce keratin
Melanocytes (Epidermis cell)
Produce melanin, the pigment responsible for skin, hair, eye color and UV protection
Langerhans cells (Epidermis cell)
Detect harmful invaders like bacteria, viruses, and allergens, and helping launch an immune response
Merkel cells (Epidermis cell)
Detect light touch, located in the stratum basale
Keratin
A strong fibrous protein that gives skin its strength and waterproof quality
Fibroblasts (Dermis cell)
Secrete collagen, elastin, glycosaminoglycans and other components of the extracellular matrix
Adipocytes (Dermis cell)
Fat cells
Macrophages (Dermis cell)
Phagocytic cells that engulf potential pathogens
Mast cell (Dermis cell)
Antigen-presenting cells play a role in the inflammatory response (release histamine)
