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24 Cards in this Set
- Front
- Back
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Stratified squamous (keratinized) epithelium
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Epidermis
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Thick Skin Epidermis Layers
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stratum germinitivum
stratum spinosum stratum granulosum stratum lucidum stratum corneum |
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Single layer of columnar or cuboidal cells
Basophilic cytoplasm Mitoses present Sits on basal lamina |
stratum germinitivum (basale)
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cells APPEAR to have cytoplasmic spines.
Some mitoses |
stratum spinosum (prickle cell layer)
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Diamond-shaped
cytoplasmic keratohyalin granules no mitoses |
stratum granulosum
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clear, translucent
homogenous,eosinophilic band. flattened closely packed cells nuclei indistinct or absent cytoplasm contains lots of keratohyalin (semifluid state) |
stratum lucidum
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composed of clear, dead, flattened (scale-like) cells.
cells are desquamated from this layer nuclei absent highest concentration of keratin (keratohyalin + tonofilaments) |
stratum corneum
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In this layer of dermis dermis “projects” up into the epidermis.
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Papillary layer
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NOT considered part of skin
some areas - lots of fat pads: PANNICULUS ADIPOSUS |
Hypodermis
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light-staining; involved in the transport of ionic substances from the interstitium to the lumen of the sweat gland.
what cell and what part of the sweat gland |
clear cells [secretary portions of sweat glands]
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darker-staining; involved in the synthesis & secretion of a mucinous glycoprotein that forms a film on the skin.
what cell and what part of the sweat gland |
dark cell [secretary portions of sweat glands]
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In this stage in hair development is also known as the condensation of C.T. The mass of cells invaginates the base of the bulb
(expanded portion of follicle). |
dermal papilla
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the dermal papilla contains a high concentration of (4):
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(1) blood vessels, (2)
nerves, (3) lymphatics, & (4) loose C.T. cells |
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The epidermal root sheath consists of several layers. This layer is continuous with the deeper layers of the epidermis. It is separated from the dermal root sheath
by the glassy membrane (basement membrane) |
Outer root sheath
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The epidermal root sheath consists of several layers. The inner root sheath also consists of three layers. What are they?
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a) Henle’s layer
b) Huxley’s layer c) Cuticle of root sheath |
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the layer of the inner root sheath that consists of a single layer of clear, flattened, overlapping kerantinized cells with a free edge which is directed downward and interdigitate?
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Cuticle of root sheath
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the layer of the inner root sheath that consists of several layers of cells is?
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Huxley’s layer
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the layer of the inner root sheath that consists of a single layer of cells is?
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Henle’s layer
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This part of the hair shaft, forms the central portion of the shaft. It contains “soft” keratin and some
melanin. |
Medulla
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This part of the hair shaft, forms the major part of the wall of the hair. Contains melanin in and between
the cells. |
Cortex
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This part of the hair shaft, forms the outer layer of the hair. Consists of a single layer of clear, flattened,
overlapping kerantinized cells. The cells have a free edge which is directed upward and interdigitate with similar cells. |
Cuticle
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this secretory product of Sebaceous Glands is mucinous and contains phospholipids, triglycerides, wax
esters, and free fatty acids. |
sebum
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this type of sensory ending in the skin has a free nerve endings; may be any of the three functional types (mechano,nocio, or thermo)
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unencapsulated
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There are two types of encapsulated nerve endings what are they?
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1) Pacinian corpuscles
2) Meissner’s corpuscles |
