1.6B Integumentary System Flashcards
Vitamin synthesized by skin cells needed in calcium metabolism and bone formation
Vitamin D
Embyological origin of epidermis
Ectoderm
Embryological origin of dermis
Mesoderm
Classification of subcutaenous tissue/hypodermis/subcutis
Loose CT
finger-like projections which anchor the epidermis to the dermis; responsible for finger printss
Rete ridges
Layer of the epidermis responsible for constant regeneration of other layers in the dermis; mitotic division
Stratum basale
Thickest epidermal layer where polyhedral keratinocytes are found; synthesizes keratin
Stratum spinosum
Layer of epidermis only found in thick skin
Stratum lucidum
Epidermal layer consisting of flat flakes and sheets of keratin; anuclear; touch protective layer in directcontact with outside environment
Stratum corneum
Clinical skin condition where there is abnormal increase in the number of proliferating cells in the basal layer; autoimmune disease tiggered by stresses
Psoriasis vulgaris
A depigmentation idsorder resulting from degeneration and disappearance of melanocytes
Vitiligo
Hereditary inability of the melanocytes to synthesize melanin; caused by absence of tyrosinase activity
Albinsim
Layer of the dermis that contains mast cells, wbcs, and macrophages; more ground substance and fibroblasts
Papillary layer of the dermis
Layer of dermis made of dense irregular connective tissue, contains blood vessels, nerve and skin appendages; stains more deeply; responsible for skin elasticity
Reticular layer
Sweat gland found in most surfaces of the body except in axilla, areola, and anal regions
Eccrine glands
Sweat gland active during cholinergic sweating
Eccrine gland
Sweat gland active during adrenergic sweating
Apocrine gland
Location of pacinian corpuscles
Deep dermis
Sensory receptor for light touch
Meissner’s corpuscles
Location of meissner’s corpuscles
Found in dermal papillae under the epidermis of the lips, thick skin of fingers and toes
