stratum basale

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stratum

 [stra´tum, strat´um] (L.)
a sheetlike mass of tissue; see also lamina and layer.
stratum basa´le the deepest layer of the epidermis, composed of a single layer of basophilic cells. Called also basal layer of epidermis.
stratum cor´neum the outer horny layer of the epidermis, consisting of cells that are dead and desquamating. Called also horny layer.
stratum germinati´vum
1. the stratum basalis and stratum spinosum considered together; called also malpighian layer.
2. the lower layer of the nail, from which the nail grows; called also germinative layer.
stratum granulo´sum the cell layer of the epidermis lying between the stratum lucidum and the stratum spinosum. Called also granular layer.
1. the deep layer of the cortex of the cerebellum.
2. the layer of follicle cells lining the theca of the vesicular ovarian follicle; called also granular layer.
stratum lu´cidum the clear translucent layer of the epidermis, just beneath the stratum corneum. Called also clear layer.
stratum spino´sum the layer of the epidermis between the stratum granulosum and stratum basalis, marked by the presence of prickle cells; called also spinous layer and prickle-cell layer.

strat·um ba·sa·'le

1. the outermost layer of the endometrium that undergoes only minimal changes during the menstrual cycle; Synonym(s): basal layer

stratum basale

1 also called basal layer, stratum germinativum. The deepest of the five layers of the epidermis, composed of cuboidal-shaped cells. This layer provides new cells by mitotic cell division. Compare stratum corneum, stratum granulosum, stratum lucidum, stratum spinosum. See also skin.
2 the deepest layers of the uterine decidua, containing uterine gland terminals.

stra·tum ba·sa·le

(strā'tŭm bā-sā'lē)
1. The outermost layer of the endometrium, which undergoes only minimal changes during the menstrual cycle.
Synonym(s): basal layer.

stratum basale

; stratum germinativum; germinal layer; basal layer deepest layer of the epidermis lying at dermoepidermal junction, keratinocytes and melanosomes Table 1
Table 1: Constituents of skin
ConstituentComponents
EpidermisStratified squamous epithelium formed from keratinocytes
Basal layer: keratinocytes linked by desmosomal and hemidesmosomal and filamentous connections (cytoskeleton; prevents shear)
Spinous layer: keratinocytes shrink, retaining contact only at desmosomes and hemidesmosomes
Granular layer: keratinocytes secrete complex lipids which act as a semipermeable skin barrier
Corneal layer: cell and contents have become keratin to form squames moved towards the exterior
Epidermal cellsKeratinocytes
Melanocytes: lie between keratinocytes; secrete pigment and protect keratinocyte nuclei from ultraviolet radiation
Merkel cells: sensory cells
Langerhans cells: within spinous layer; antigen-presenting cells
Basement membrane zoneCollagen, hemidesmosomes, laminin which aid adhesion of epidermis to dermis; dysfunctional in disease such as epidermolysis bullosa
DermisMesodermal tissue containing blood vessels, nerve, muscle, skin appendages (sweat glands, sebaceous glands, hair follicles), immune cells (histamine-releasing mast cells) in a matrix of collagen, elastin and hyaluronic acid
Subcutaneous layerAdipose tissue, blood vessels and nerves, acting as an insulating layer

stra·tum ba·sa·le

(strā'tŭm bā-sā'lē)
1. The outermost layer of the endometrium that undergoes only minimal changes during the menstrual cycle;
Synonym(s): basal layer.

stratum

pl. strata [L.] a sheetlike mass of tissue of fairly uniform thickness; distinct layers making up various tissues or organs, as of the skin, brain, retina.

stratum avasculosum
the avascular stratum in the margin of the iris.
stratum basale
the mitotically active, basal layer of the epidermis, consisting of columnar to cuboidal keratinocytes on a basement membrane.
stratum corneum
the outer horny layer of the epidermis, consisting of cells that are non-nucleated, keratinized and desquamating.
stratum germinativum
in the epidermis, located between the stratum basale and the stratum granulosum. Together with the basal layer, called the malpighian layer. Called also germinative layer.
stratum granulosum
1. the layer of cells between the stratum lucidum and the stratum spinosum of the skin, very thin and not always present. Called also the granular layer.
2. the deep layer of the cortex of the cerebellum.
3. the layer of follicle cells lining the theca of the vesicular ovarian follicle. Called also granular layer.
stratum lamellatum
laminae of the hoof corium.
stratum lucidum
the translucent layer of the skin just beneath the stratum corneum. Called also clear layer. Present in the epidermis of the planum nasale of several species and footpads of carnivores.
stratum spinosum
the layer of the epidermis between the stratum granulosum and the stratum basale, marked by the presence of prickle cells; called also spinous layer and prickle-cell layer.
stratum tectorium
the layer of horny scales claimed to exist on the surface of the horse's hoof that gives it the smooth glossy appearance.
References in periodicals archive ?
Imaging studies show a heterogeneous mass reflecting the presence of tissues from all 3 germinal layers and many contain calcification.
Our case of gastric teratoma had components of all 3 germinal layers, including neuroepithelial tubules.
For example, research shows the cord blood-derived MLPC stem cell has the ability to turn into cells representative of the three different embryonic germinal layers, including liver and pancreatic precursor cells, terminally differentiated liver cells, lung cells, fat cells, cartilage cells, bone cells, skeletal muscle, blood vessels, neural stem cells and nerve cells.
Dermoid cysts can be composed of elements descending from all three of the germinal layers, but in ovarian DCs, ectodermic differentiation frequently occurs.
Researchers then differentiated the MLPC into cell types representative of the three germinal layers (e.
The results of the University of Minnesota study also further demonstrate the MLPC's unique ability as a cord blood stem cell to expand and differentiate -- in a controllable fashion -- into tissues representative of the three germinal layers (e.