Block 3 - Integument Flashcards Preview

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Flashcards in Block 3 - Integument Deck (47):
1

part of skin that is keratinized cornified stratified squamous epithelium

epidermis

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epidermis cells are called blank

keratinocytes

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layer of collagenous connective tissue under skin

dermis

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thick or thin skin refers to thickness of the blank

epidermis

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these are most numerous in thick skin and doesnt have hair or sebaceous gland

sweat glands

6

not an official layer of skin and contains superficial fatty fascia

hypodermis

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in thin skin, all blank strata are thinner especially blank

epidermal, stratum corneum

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layer of epidermis that has a single layer of cuboidal or columnar cells

stratum basale

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stratum basale has many blank between adjacent cells and blank between cell and basal lamina

desmosomes, hemidesmosomes

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stratum basale has blank filaments and a blank cytoplasm

intermediate, basophilic

11

layer of epidermis when cells pull apart except at desmosomes, and there are increased intermediate filaments

stratum spinosum

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layer layer of epidermis that contains two types of granules including keratohyalin, lamellar or membrane coating

stratum granulosum

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basophilic granules rich in protein, no membrane, not exported, filaments pass through them

keratohyalin

14

granules seen only under EM, have membrane, are exocytosed, make lipid coating for keratinocytes

lamellar (membrane coating)

15

layer of epidermis that is thin white and unstained, densely packed keratin filaments, thick plasmalemma, identifiable only in thick skin

stratum lucidum

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stratum lucidum is identical to blank

stratum corneum

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layer of epidermis that is keratinized flat "cells", for wear and tear, cytoplasmic sacs filled with keratin filaments in an amorphous matrix

stratum corneum

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three non keratinocytes in epidermis

melanocytes, langerhans cells, merkel cells

19

melanocytes come from what embryo origin

neural crest cells

20

melanocytes resist staining and are under this layer

stratum basale

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this is produced by ribosomes, transported in rough er to golgi, and incorporated into melanosomes

tyrosinase

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blank is converted into melanin

tyrosine

23

antigen presenting cells from marrow and are phagocytes

langerhans

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langerhans cells travel lymphatics to lymph node and give info to activate a blank

t lymphocyte

25

dendritic cells present in basal layer that are mechanoreceptors for touch

merkel

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merkel cells have desmosomes that connect to blank

keratinocytes

27

two layers of dermis

papillary, reticular

28

layer of dermis immediately under epidermis and forms these projections that interdigitate with epidermal ridges (pegs)

papillary

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layer of dermis that is thick bundels of dense irregular ct, running in all directions

reticular

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invagination of epidermis into dermis/hypodermis, ends as a bulb in ct

hair follicle

31

three layers of hair follicle that undergo cornificiation

outer root sheath, inner root sheath, hair shaft

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blank dissolves and disappears at level of sebaceous gland

inner root sheath

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outgrowth of outer root sheath with several acini

sebaceous gland

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sebaceous gland drains into blank

upper hair follicle

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mode of sebaceous gland secretion

holosecretion via hair or directly onto skin in the form of sebum

36

mass of cells attached to hair follicle just below sebaceous gland duct

hair bulge

37

even if bald, blank persist but blank are not present

hair follicles, hair shaft

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smooth muscle bundle from ct of hair follicle below sebaceous gland to papillary level of dermis

arrector pili muscle

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goose bumps are caused by blank

arrector pili muscle

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sweat glands found over most of the body and not associated with hair follicles

merocrine

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cells that surround secretory part of merocrine sweat glands

myoepithelial

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sweat glands that drain into hair follicles located in axilla, pubic, perineal, scrotal

apocrine

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apocrine glands are blank than merocrine (eccrine)

larger

44

secretion of apocrine glands is odorless but this causes the odor

bacterial decomposition

45

skin is involved in blank synthesis with uv light which is produced by blank

vitamin 3, keratinocytes

46

Hair is only attached here

Bottom

47

Hair bulge contains blank

Stem cells