شرائح هستولوجي ........ متجدد

[GOUTOZ]

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دي مجموعة من شرائح الهستولوجي
و كل شوية ححط شرائح جديدة
نبدأ على بركة الله

Epithelium


http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-01.jpg

Mesothelium seen as if looking down on a surface view to see "pavement" effect of the lining cells. Silver stains the intercellular cement dark between adjacent cells. Notice how corrugated the cell membranes are. Mesothelium = the simple squamous epithelium lining body cavities and mesenteries.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-02.jpg

High power view of endothelial cells lining a small blood vessel cut in cross-section. (You see just the nuclei - the cytoplasm between them is extremely flat.) Endothelium = the simple squamous epithelium lining blood vessels.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-03.jpg

Low power view of larger vessels, showing endothelial nuclei lining the lumen. The yellowish cells filling each vessel's lumen are blood cells.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-04.jpg

Simple cuboidal epithelium lining a tubule (longitudinal cut). Some of the cell boundaries between "blocks" or "cubes" here are quite distinct.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-05.jpg

Simple cuboidal epithelium in Mallory stain (longitudinal cut). Note the dark chromatin clumps in the nuclei. Underneath the epithelium lies a small blood vessel filled with orange-colored blood cells.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-06.jpg

Cross-section of tubules. The smaller ones clustered in the center and upper left are lined by simple squamous epithelium. The larger pink tubules have simple cuboidal epithelium.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-07.jpg

A tubule stained to show the pink basement membrane underlying the base of the simple cuboidal epithelium. Stained with periodic acid Schiff reagent (PAS), which stains mucopolysaccharides.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-08.jpg

Simple columnar epithelium with very regular line-up of nuclei.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-09.jpg

Simple columnar cells cut tangentially to show how they form a very regular "pavement" when viewed from the surface. The cells are like tall blocks arranged very closely to each other with a small amount of tissue fluid in between.

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http://www.meddean.luc.edu/LUMEN/MedEd/Histo/HistoImages/hl1-10.jpg

Detail of simple columnar epithelium with striated border (microvilli). Notice that the border is quite thin and the striations close together, looking like very regular, closely set brush bristles.

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أرجو أن تعجبكم

و أنتظرو البقية

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[الطريف]

الله يعطيك العافية

أفضل مافي الأمر أن كل شريحة مكتوب الصبغة المستخدمة فيها

[أبو حيدرة التوتي]

رائع جدا....و مفيد... لا تبخل علينا بجديدك

[GOUTOZ]

شكرا جزيلا على مروركم

[GOUTOZ]

http://www.meddean.luc.edu/lumen/meded/histo/HistoImages/hl1-11.jpg

EM of cells with striated border. Notice the evenness and regularity of the microvilli. This is an adaptation of the cell surface for absorption. Notice also the corrugation of the cell boundaries as they fit next to each other. 1= nucleus; 2=brush border (microvilli); 3=lymphocyte.

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http://www.meddean.luc.edu/lumen/meded/histo/HistoImages/hl1-12.jpg

Detail of simple columnar epithelium with a goblet cell secreting mucus. The thin, clearly defined band along the top epithelial surface is the striated border, though the individual striations (or microvilli) are not visible at this magnification. The lower edge of the striated border is the location of the terminal web; the dots along the line of the web, seen in between the individual epithelial cells, are the so-called terminal bars, which are found in EM to consist of various cell junctions.

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http://www.meddean.luc.edu/lumen/meded/histo/HistoImages/hl1-13.jpg

EM of apical (top) surface of two epithelial cells whose cell membranes lie next to each other. The microvilli (1) of the striated border are very straight and regimented in appearance. Microfilaments within them can be seen extending down into the terminal web (2), which is an aggregate of fine filaments lying in the cell cytoplasm. Several junctional complexes are seen including tight junction (zonula occludens =3); intermediate junction (zonula adherens =4); and desmosome (macula adherens =5).

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http://www.meddean.luc.edu/lumen/meded/histo/HistoImages/hl1-14.jpg
Four rows of simple columnar epithelium facing each other in pairs (left and right) across a narrow lumen or channel that lies in the middle of each pair. (This is a Mallory Trichrome stain.) The goblet cells are filled with blue mucoid secretion which is being poured into the narrow lumens. Notice that in all four rows of epithelium there is a narrow band of striated border next to the lumen; the dark purple line at the base of the border is the terminal web. Look at the right hand rows of epithelial cells and notice the dark dots all along the terminal web lines; these dots represent the junctional complexes between cells. The central cavity in the picture is a blood vessel with endothelium, surrounded by a very cellular connective tissue. Separating this connective tissue from the epithelium is a thin blue layer of connective tissue fibers.

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[loveshad00w]

مشكور علي الشرائح
واتمني المزيد
زانتظر الجديد
جعلة اللة في ميزان حسناتك

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شكرا جزيلا

[GOUTOZ]

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