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35 Cards in this Set
- Front
- Back
Epithelial |
Tissue composed of layers of closely spaced cells that cover organ surfaces, form glands and serve for protection, secretion and absorption |
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Tissue with usually more matrix than cell volume, often specialized to support, bind and protect organs |
Connective tissue |
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Nervous tissue |
Contains excitable cells specialized for rapid transmission of coded information to other cells |
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Tissue composed of elongated, excitable muscle cells specialized for contraction |
Muscular tissue |
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Cells of Fibrous connective tissue |
1)Fibroblasts- large cells that produce fibers and form matrix
2) Macrophages- large phagocytotic cells, activate immune system
3) Leukocytes 4) plasma cells 5) adipose cells |
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Tight junction |
Completely encircles an epithelial cell near its apical surface and joins it tightly to the neighboring cells.
Like plastic harness on soda cans |
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A patch that holds cells together, somewhat like the snap on a pair of jeans |
Desmosome |
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Formed by a COnnexon, allow electrical excitation pass directly from cell to cell so cells contract. NOT in skeletal muscle |
Gap junction |
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Bone tissue: canaliculi |
Delicate channels radiate from each lacuna to its neighbors. Allow osteocytes to connect |
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Supports and organizes the glandular tissue Connective tissue framework of gland |
Stroma |
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Parenchyma |
Cells that perform tasks of synthesis and secretion: function Ex: parenchyma of lungs is elasticity |
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Melanin |
Produced by melanocytes but accumulates in the kartinocytes of the stratum basal. Skin color |
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Sudoriferous glands |
Sweat glands- apocrine and merocrine |
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Sebaceous glands |
Produce oily secretion called Sebum Open directly Onto skin surface |
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Only found in external ear canal, where secretion combines with sebum wnd dead epidermal cells to form ear wax |
Ceruminous glands |
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Merocrine sweat glands |
Widely distributed over the entire body. Abundant on palms, soles and forehead. Cool the body through sympathetic nervous tissue |
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Functions of skin |
Protection, containment, heat regulation, sensation and vitamin D |
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Functions of skin |
Protection, containment, heat regulation, sensation and vitamin D |
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Epidermis layers |
1.) stratum basale- push cells up 2.) stratum spinosum- clear 3.) stratum granulosum- flatten cells, destroyed living cells 4.) stratum Lucidum- regeneration 5.) stratum Corneum- cells fall off (Come let's get sun burned) |
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Keratinocytes |
The building blocks of tough fiberous protein keratin. Waterproofing to hair, nails, skin |
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Langerhan cells of skin |
Ingest unwanted invaders |
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Merkel cells |
Combine with nerve endings to create a sensory receptor for touch |
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Thick skin |
5 epidermal layers (Palms of feet and hands) |
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Thick skin |
5 epidermal layers (Palms of feet and hands) |
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Thin skin |
4 epidermal skin |
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Dermis |
1.) papillary layer- areolar connective tissue, form ridges( finger prints) 2.) reticular layer- makes up 80% of dermis. Dense irregular 3.) hypodermis- adipose tissue, insulation, shock absorption |
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Jaundice |
Liver disorder |
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Jaundice |
Liver disorder |
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Vitamin D |
Required to produce new bone cells |
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Hair structure |
1) shaft- keratinization is complete 2.) root- keratinization is still happening |
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Eccrine sweat glands |
Palms, forehead, feet Coiled, tube leads to outside skin |
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Eccrine sweat glands |
Palms, forehead, feet Coiled, tube leads to outside skin |
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Apocrine gland |
2,000 glands, start at puberty. Groin, armpits Secrete fat/protein. Oder. |
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Hair growth |
Grows from dermal papilla. 1.) Anagen phase- growing, pushes out old hair 2.) categen phase- dying, growth stops, detaches from dermis papilla 3.) telogen phase- resting, lasts 6 months, cannot be repaired, dull |
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Round/ flat hair |
More groups of protein, more hair will curl.
Shapes of follicle Round- straight hair Flat- curly hair |