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24 Cards in this Set
- Front
- Back
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Histology |
Study of tissues |
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Layers and tissues of skin |
Endoderm- forms lining of digestive tract and derivatives Mesoderm- forms muscle, bone, and blood vessel tissues Ectoderm- forms skin and neuroectoderm |
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Epithelial cells functions |
1) protecting underlying structures 2) acting as barriers 3) permitting the passage of substances 4) secreting substances 5) absorbing substances |
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Shapes of epithelial cells |
1) squamous-flat, scale like 2) cuboidal- about equal in height and width 3) columnar- taller than wide |
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Positions- simple squamous |
lining of blood and lymphatic vessels and small ducts, alvedi of lungs, loops of the henle in kidney tubules, lining of serous membranes and inner surface of eardrum |
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Positions- Simple cuboidal |
Kidney tubules, glands and their ducts, choroid plexus of the brain, lining of terminal bronchioles of the lungs, and surface of ovaries. |
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Simple columnar |
Glands and ducts, bronchioles of lungs, auditory tubes, uterus, uterine tubes, stomach, intestines, gallbladder, bile ducts and ventricles of brain |
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Stratified squamous |
Moist, keratinized |
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Stratified cuboidal |
Sweat glands ducts, ovarian follicular cells, and salivary gland ducts |
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Stratified columnar |
Mammary glad duct, larynx, portion of male urethra |
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Pseudo stratified columnar |
Lining of nasal cavity, nasal sinuses, auditory tubes, pharynx, trachea, and bronchi of lungs |
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What lines the digestive tract |
Endoderm |
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Transitional epithelium |
accommodates fluctuations in the volume of fluid in an organ or tube; protections against the caustic effects of urine |
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Cell to cell connections |
1) desmosomes- disk shaped regions of cell membrane 2) right junction- holds cells together, form permeability barrier 3) gap junction- protein channels aid intercellular communication |
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Glands |
1) merocrine- secretion leaves by active transport or exocytosis 2) apocrine- fragments of the gland go into secretion; apex of cell pinches off 3) Holocrine- whole cell becomes part of secretion; it accumulates in cell; cell ruptures and dies |
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Hyaluronic acid |
Polysaccharide; good lubricant, vitreous humor of eye |
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Dense regular tissue with parallel collagen fibers |
Tendons and ligaments |
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Dense regular elastic tissue with elastic fibers |
Nuchal ligament |
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Dense irregular connective with collagen and elastic fibers |
Collagen- inner dermis layer Elastic- aorta |
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Reticular tissue |
Spleen and lymphnode |
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Cartilage |
Hyaline, fibrocartilage, elastic |
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Where are lipids stored |
Yellow(white) and brown adipose |
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Mediators of inflammation |
Histamine, kinins, prostaglandins, leukotrienes Stimulate pain receptor and increase blood vessel permeability |
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Scar formation |
1) wound fills with blood 2) clot forms 3) scab 4) inflammatory response 5) granulation tissue 6) scar |
