MODULE 2B : INTEGUMENTARY SYSTEM Flashcards
Develops from the underlying mesenchyme
DERMIS
Embryonic origin of Epidermis
SURFACE ECTODERM
Source of cells which invades the epidermis in the first 3months
NEURAL CREST
Corium forms irregular papillary structures which give rise to
DERMAL PAPILLAE
Layer which contains large amounts of fatty tissue
SUBCORIUM
Whitish paste which covers the skin at birth
VERNIX CASEOSA
Characteristic of cells in the center of hair shaft
SPINDLE SHAPE / KERATINIZED
Characteristic of cells in the epithelial hair sheath
CUBOIDAL
Embryonic origin of sweat glands and mammary glands
EPIDERMAL PROLIFERATIONS
Buds from germinative layer of the epidermis
ECCRINE (sweat glands)
From same epidermal buds that produce hair follicles
APOCRINE
Ectodermal thickening of the dorsum of the digits
NAILS
Epidermal layer which has a constant supply of keratinocytes
STRATUM BASALE
Characteristics of the Cells in Stratum Basale
CUBOIDAL / COLUMNAR (single layer)
NUCLEUS : large
CYTOPLASM : basophilic
Characteristics of cells found in Stratum Spinosum
LARGE, CUBOIDAL / POLYGONAL, FLATTENED (some)
NUCLEUS : centrally located
CYTOPLASM : basophilic
Characteristics of cells found in Stratum Granulosum
2-3 ROWS OF FLATTENED CELLS
NUCLEUS : central
CYTOPLASM : basophilic (Keratohyalin)
Layer of dead and dying cells
STRATUM CORNEUM
Characteristics of cells found in Stratum Corneum
FLAT & CORNIFIED; ANUCLEATED
Layer that cannot be found in thin skin
STRATUM LUCIDUM
Dendritic cells found in all layers of epidermis
LANGERHANS CELLS
Antigen-presenting cells, for contact allergic and other cell-mediated response
LANGERHANS CELLS
Specialized touch receptors scattered sparsely among basal cell layer
MERKEL CELLS
2 zones of dermis
PAPILLARY & RETICULAR
Characteristic CT of Papillary dermis
LCT
Characteristic of CT in Reticular Dermis
DICT
Subcutaneous layer of loose connective tissue beneath the dermis
HYPODERMIS
A terminal expansion of the follicle where hair growth takes place
HAIR BULB
Lubricates the epidermis and hair
SEBACEOUS GLANDS
Characteristic of sebaceous glands
SIMPLE BRANCHED ALVEOLAR GLANDS
Characteristic of sweat glands
SIMPLE COILED TUBULAR GLANDS
Glands which are important in themoregulation
SWEAT GLANDS
Has viscid, milky secretions which, when acted upon by bacteria, produces an objectionable odor
APOCRINE SWEAT GLANDS
Proximal end of the nail
NAIL ROOT
Underlying nail root; where nail growth occurs
NAIL MATRIX
White crescent shape at the base of the nails
LUNULA
Skin overlying root of the nail
NAIL FOLD
Highly keratinized free edge of nails
EPONYCHIUM
Skin beneath free end of nail
HYPONYCHIUM