histopathology of inflamed apical tissues with special attention to their epithelial content

by Jack Kreutzer

Publisher: Faculty of Dentistry, University of Toronto] in [Toronto

Written in English
Published: Downloads: 326
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Edition Notes

Thesis (B.Sc.D.)--University of Toronto, 1933.

StatementJack Kreutzer.
ID Numbers
Open LibraryOL17285189M

  One thing that's hard to get the hang of in pathology is the difference in appearance between chronic and acute inflammation in tissue sections. It's pretty easy to tell a neutrophil from a lymphocyte in blood smears - but it's a different story in tissue sections. The epithelium of the duct is pseudostratified columnar. The tall epithelial cells have long microvilli on their apical surface (sometimes called “stereocilia”, although they are not cilia at all). You may be able to make out a thin layer of smooth muscle around the tubules, which presumably acts by peristalsis to move the sperm along. The intercalated ducts are lined by cuboidal to flattened epithelium in mice and cuboidal epithelium in humans (Figures 7 and 8).In mice, these are often histologically indistinct in all glands and also relatively short in the submandibular gland. Intralobular (striated) ducts are lined by cuboidal to low-columnar cells in mice and tall columnar cells with large, apically-located nuclei in humans.   Introduction. Pancreatic duct cells not only deliver the enzymes produced by acinar cells into duodenum but also secrete a HCO rich fluid to neutralize gastric acid from the stomach. 1 Tight junctions of the pancreatic duct are regulators of physiologic secretion of the pancreas and disruption of the pancreatic ductal barrier. The tight junction, the most apically located of the.

  These artifacts include surface epithelial degeneration, edema, hemorrhage and congestion (Figs. and ), aggregation of inflammatory cells, pseudolipomatosis (intramucosal air; Fig. ), mucin depletion, and even neutrophilic cryptitis in extreme cases. Pathologists should not be afraid to render a diagnosis of “normal colon.”. This banner text can have markup.. web; books; video; audio; software; images; Toggle navigation.   • Inflammation is the initial change in the formation of the periodontal pocket (Nuckolls & Dienstein, Bell & Rule, ) • 1st change- vascular change in the underlying connective tissue. • Inflammation of connective tissue stimulates epithelial lining of sulcus leading to: – Inc. mitotic activity in basal epithelial layer – Inc. Epithelial–mesenchymal transition (EMT) causes epithelial cells to lose their polarity and adhesion property, and endows them with migratory and invasive properties to enable them to become mesenchymal stem cells. EMT occurs throughout embryonic development, during wound healing, and in various pathological processes, including tumor progression.

Soy protein is the major source of protein as fishmeal replacement in fish feed because of its worldwide availability and low price. However, the presence of high carbohydrate content along with saponins, lectins, and phytates can have a negative impact on fish gut health. Based on the literature and our lab studies, dietary soybean meal can cause a dose-dependent type of distal intestine. Objectives: This article describes the histologic events associated with the radicular pulp and the apical tissues of human immature teeth following pulp inflammation and necrosis. Conclusions. The developmental observations herein and in an earlier study (TEM) of scorpion book lungs show that the lamellae in book gills and book lungs result from some similar activities and features of the precursor epithelial cells: proliferation, migration, alignment and apical/basal polarity with secretion of cuticle from the apical surface and the basal surface in contact with hemolymph. In affected tissues, the progression of local inflammation contributes to the clinical outcome of the disease. Cytokines and chemokines lead to the migration of leukocytes to the periodontal tissues where these cells play an important role in pathogen destruction by releasing mediators in .

histopathology of inflamed apical tissues with special attention to their epithelial content by Jack Kreutzer Download PDF EPUB FB2

Based on classic histology (Harndt, ), there has been a consensus that ‘solid granuloma’ may not harbor infectious agents within the inflamed periapical tissue, but that micro-organisms are consistently present in the periapical tissue of cases with clinical signs of exacerbation, abscesses, and draining by: CHAPTER 4 TISSUES - HISTOLOGY - The study of tissues.

- 4 basic tissue types, each w/ subtypes: * epithelial- covering & secretion. * connective - support & attachment. * muscle - movement (locomotion & pump). * nerve - e- transmission for info & control.

- Each visceral organ is made up of combinations of 2 or more of these, arranged in. Histopathology remains one of the major tools of diagnosis in mycology[20] [Table 3]. The major advantages of histopathology are speed, low cost and the ability to provide a presumptive identification of the infecting fungus as well as demonstrating the tissue reaction.

However, unless special techniques. Figure The three major layers of the skin, and the major tissue types in each. Histology of the skin – for comparison. The skin and the oral mucosa share a lot in common because of their shared lineage ← from ectoderm and are composed of a stratified squamous epithelium ←, just deep to that areolar connective tissue ←, followed by dense irregular connective tissue ←.

stratified squamous epithelial tissue 3) Use your textbook and the Histology Photo Album On-Line to draw each epithelial tissue as listed below. Include the following labels for each epithelial tissue within your histology atlas: (You may use a pencil to label any drawings). title of the tissue b.

apical surface c. nucleus d. basement. Histology Department Epithelial Tissue Characteristics •Originates from all the three germinal layers. •Cells are tightly packed with little extracellular space and minimal intercellular substance.

•Lines free surface open to the outside or an open internal space (body cavity). Figure Stem cells in the basal layer of a stratified epithelium. Epithelia are thin.

Epithelial tissue is good at healing because it contains numerous stem histopathology of inflamed apical tissues with special attention to their epithelial content book ← capable of undergoing mitosis ← (you can identify them when they have visible chromosomes, rather than chromatin).For thicker epithelia, stem cells reside in the basal layer.

Epithelia cannot be terribly thick, however. Larger immature basal hyperplastic cells predominate or are increased beyond their usual 1 - 2 cell layers and are instead several cell layers thick Cellular maturation is still present Most often encountered in fibroepithelial lesions with cellular stroma.

Necrosis Florid usual ductal hyperplasia can rarely demonstrate central necrosis. Chapter 4: Histology-tissues. STUDY. PLAY. Histology. study of tissues.

4 major types of tissues Free edge or apical surface. Functions of Epithelial tissue-smooth and help together tightly so they line the circulatory system that contains our blood. Start studying Tissue and Histology. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Search. Describe the structure of epithelial tissue. may have microvilli at their apical surface. Funtion in secretion of mucus, sweat, enzymes, and absorption of digested food.

-extensions of apical plasma men with microtubule core-axoneme (9 doublets+2 single microtubules)-basal body (centrioles form basal body)-Function: contract in wave-like motion to move fluid or particulate matter across epithelial surface. Also, mechanoreceptors in the kidney. It is special in that its apical surface attaches to the tooth by way of hemi-desmosomes.

Other epithelia attach to connective tissue only on their basolateral surface, their apical surface faces the external environment.

This unique attachment to the tooth surface is referred to as the epithelial attachment (EA). This uniqueness is challenging. Start studying Histology-Epithelial Tissue. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Apical structures of epithelial cells that increase surface area or move substances. Brush border. cells release their products by exocytosis-. Cysts call develop in two ways an abscess cavity formed by inflammation due to breaking down of the tissues around the infected root apex, and through degeneration within the epithelial strands.

The extraction of the tooth that caused the inflammation in the bone _ _ _ Charles B. Hopkins by no means always causes the area to disappear. Histology - Epithelial tissue. STUDY. PLAY. Covering tissue. what type of tissue is epithelial tissue.

Covers and lines body surfaces 2. Cells are densely packed together with minimal amount of intercellular substance 3. Cells are firmly attached by intercellular.

Any tissue or organ can become inflamed. Inflammation of a particular body part is named according to the site, with the "-itis" suffix appended (e.g., tonsillitis, appendicitis, dermatitis, arthritis, sinusitis, etc.). Thus many disease names are really just words that identify sites of inflammation.

Tissue repair. Following inflammation. • In special situation epithelial cells lack a free surface • (epitheliod tissue) Derived from progenitor mesnchymal cells Ex- interstitial cells of leydig, islets of Langerhans,parenchyma of adrenal gland, tumor derived epithelium, epithelioreticular cells of thymus, accumulation of CT macrophages in response to injury or infection, 5.

CASE NUMBER Clinical History: A 58 year old African American female had been hemiplegic on the right for a period of 3 months prior to death. She developed fever and dyspnea several days prior to death. Gross: There was a thrombosis of the left internal carotid artery with infarction of the left cerebral hemisphere.

There was a massive embolus of the right pulmonary artery. Lack an apical mucin cap. All mucous cells have round, basally oriented nuclei. Parietal cells Produce hydrochloric acid via H+ / K+ -ATPase pump (Varela: Histology, Parietal Cells, ) Hydrochloric acid maintains gastric acidity (pH to ), which: Activates pepsinogen to active pepsin enzyme Kills food derived bacteria.

Next, epithelial cells coordinate with underlying neuro-mesenchymal cells, and both tissues differentiate into the cells that make enamel, dentin, pulp, cementum, the PDL and alveolar bone. By 8 weeks (before the palate has fused), there are 10 buds in each dental lamina (the regions fated to become the maxillary and mandibular alveolar ridges).

4 Tissues I. Epithelial Tissue 65 Special Characteristics of Epithelia 66 Classification of Epithelia 66 Glands 72 Epithelial Surface Features 74 II. Connective Tissue 77 Special Characteristics of Connective Tissues 78 Structural Elements of Connective Tissues 78 Classification of Connective Tissues 81 Covering and Lining Membranes 89 III.

Histology: Epithelial and Connective Tissue The apical surface is the free surface in both cases, i.e. the surface toward the lumen of an enclosed tubule or duct, or movement along their apical surface occurs, such as in the large bronchioles of the respiratory tract.

FIG.1A (HE): The epithelial cells lining many proximal tubules have small (1 to 2 micron) eosinophilic protein droplets in their cytoplasm. FIG.1B (PAS): The small protein droplets in the tubular epithelial cells are PAS positive.

FIG.1C (MT): The small protein droplets in the tubular epithelial cells stain red with trichrome. LIPID VACUOLES can be observed in nephrotic states. These glial cells appear similar to epithelial cells, making a single layer of cells with little intracellular space and tight connections between adjacent cells.

They also have cilia on their apical surface to help move the CSF through the ventricular space. The relationship of these glial cells to the structure of the CNS is seen in Figure Tissues are formed by cells and can be differentiated into four different types: connective tissue, muscle tissue, nerve tissue, and epithelium (epithelial tissue).

Epithelium is a component of almost every organ in the body. The subtypes and functions of epithelium will be discussed in this article. Connective, muscle, and nerve tissue are addressed in the respective articles. Hand-held tools require special attention (see DIN/EN,).

The reaction forces acting on the operator along the jet axis must not exceed the value N. If reaction forces are larger than N, an additional body support must be used (see Fig.

a for an example). Reaction forces cane be calculated with Eq. The length of a. Granulomatous inflammation, medium power microscopic Granulomatous inflammation, high power microscopic Langhans giant cells in granuloma, high power microscopic.

The contents of the cyst were found to be somewhat purulent. Histopathology. Several small pieces of tissue were submitted, showing a heavily inflamed cyst.

An epithelial lining was lacking in several areas, and the remaining epithelium was thin and penetrated by large numbers of leukocytes. Tony J.C. Harris, in International Review of Cell and Molecular Biology, Abstract. Adherens junctions are essential for the development and physiology of epithelial tissues.

The Drosophila embryo is an excellent model for understanding adherens junction assembly, maintenance, and regulation during tissue development. Here, I review our current state of knowledge in this model system. The endometrial biopsy was taken in the mid-lutheal phase of the menstrual cycle from a woman with recurrent implantation failure (RIF).

Extremely high percentage of stromal and luminal epithelial. • Histology [Gr., 􏰚 􏰚 􏰚 ó􏰚, histos 􏰚 tissue; 􏰚 􏰚 􏰚 í􏰚, logia 􏰚 science], also called microscopic anatomy, is the scientific study of microscopic structures of tissues and organs of the body.

• Modern histology is not only a descriptive science but also includes many aspects of molecular and cell biology, which help describe cell organization and function.The study of tissues is called Histology. Objectives: 1. Learning about tissues in your anatomy and physiology (A&P) course will increase your understanding of how organs are put together and how they work.

An Organ is a collection of 2 or more tissues working together in performing a specific function. 2. The periodontal pocket is initiated by invasion of bacteria at the base of the sulcus or the absorption of bacterial toxins through the epithelial lining of the sulcus -Box, Destruction of gingival fibers is a prerequisite for the initiation of pocket formation -Fish, Stimulation of the epithelial attachment by inflammation rather.