Research on swine stomach histological structure

Following research we noticed that swine stomach lining presents numerous longitudinal folds with many cuts bounded by deep ditches. With 4x objective there is an overview of the stomach wall consisting of four tunics: mucosa, submucosa, muscular and serous. Lamia propria composed of loose connective tissue infiltrated by lymphocytes and mucosal muscle is composed of smooth muscle fibres. In histological examination we noticed that submucosa is composed of loose connective tissue with large blood vessels and contains nerves, Meissner submucosal plexus. Simple prismatic epithelium consists of two types of cells: high prismatic, located in the third round with core basal cells that are grouped in the bottom of the crypts. We observed high prismatic cells with apical microvilli and basal cells from pole to pole dilated basal and apical pole tapered, narrower allowing their location at the base of the crypts. Fundic glands are most numerous, straight appear in the upper and lower third bifurcated and these appears sectioned obliquely. Composed glands enter several types of cells: main basophils, parietal cells, oxintic, delomorfe and undifferentiated cells. With 40x objective is noted that the principal cells are located at the base of the gland appear grouped into nests and are the most numerous cells. These cells are cubic, small has basophil cytoplasm, nucleus euchromatic, small and round. Predominated gland parietal cells in the body are round or oval, large that protrudes outside the gland. Muscle lining is made of two layers of smooth muscle, organized on two levels: internal circular and external longitudinal. In histological examination we noticed that submucosa is composed of loose connective tissue with large blood vessels and contains nerves, plexus submucosal Meissner

Electron microscopy research on Leydig cells in breeding boards

Leydig Cells or interstitial endocrinocytes are very numerous at an adult boar, where they occupy 20-30% of the testicular tissue(1).Aims : The electron microscopy research approach studies of the Cytoplasm , Cell Organelles and the type of junctional complexes which they realize between the adjacent cells. The electron microscopy reveals the two types of interstitial endocrinocytes : small and spindle cells, with few organelles , and big cells with a cytoplasm rich in vesicles, lipid inclusions and pigments. These studies have influence over the quality of the seminal material

Research on sheep kidney histological structure

Differential renal parenchyma into two distinct Areas: the cortex and medulla the. Cortical area is located in the external capsule, known as renal cortex is composed of: the narrow area adjacent to the renal capsule, called cortical area, corticis subcapsular or cortex; Called cortical area the labyrinth That is the cortical portion of the pyramids Ferrein; Bertin renal cortical columns That has extensions Between renal tissue is adjacent pyramids. The area contains cortical kidney renal corpuscles, distal convoluted tubules, proximal convoluted tubules. The area surrounded by the renal cortex is the medullary cortical areas and the layout of the pyramids Malpighi is uniform. The gap is made up of renal tissue rich in cells that CAN BE distinguished: fibroblasts, pericytes mononuclear bone marrow Located in the loops along the Henle, Vessels That supply. There is interstitial bone marrow Located in the cells Which is made up of cytoplasmic extensions That capillaries and tubules extend to the medulla. Located in Renal corpuscles have kidney and renal cortical columns HAVING relatively spheroidal aspect. Proximal tubule nuclei have unequal compared to distal tubule arrangement has Numerous nuclei, WILLING equidistant. Medullary conical or pyramidal area consists of structures with aspect Called renal pyramids or pyramids Malpighi targeted to the renal hilum top and the base is directed Towards the cortex. The base of each pyramid to start overtime Malpighi tubules just look Entering the renal cortex and has Ferrein Called pyramids. Cortical collecting tubules has papered of a simple cubic epithelium Which comprises two types of cells: clear cells that have the principal or many, have round nuclei and cells interspersed centrally located and dark, with cytoplasmic vesicles Numerous rare localized in the apical area. Medullary tubules collectors show columnar cell wall composed of small renal papilla cells and the level is high

Histological aspects concerning the stomach of grass snake Natrix Natrix

Recent studies have described the importance of snakes, in relation to their utility in several medicinal fields. However, gaps are common in the field of snake histology, which is part of the basic knowledge on these animals. Similarly, not enough information has been published on the digestive system of the grass snake (Natrix natrix). Natrix natrix was first described in 1758, by Linnaeus. It is sometimes called the ringed snake or water snake, and it belongs to Reptilia Class, Squamata Order, Serpentes Suborder, Colubridae Family, Natrix Genus. The grass snake is widely distributed in mainland Europe, northern Africa and the Middle East. It is considered one of the most common snakes in Romania. The gastric wall reveals four layers: mucosa, submucosa, muscular layer and serosa. The mucosa has projections to the lumen, similar to those of the mammals and is composed of a lining epithelium with non-ciliated simple columnar cells (cambered), lamina propria and gastric glands. Lamina propria is composed of richly vascularized connective tissue. Two categories of glands were observed: mucosal glands, located on top, made of mucosal cells, with flattened nuclei at basal pole and vacuolar cytoplasm; serous glands, located at the bottom, made of serous cells, with central spherical nuclei and intensely colored cytoplasm. The submucosa is well represented and richly vascularized. The muscle layer of the wall was composed of an inner circular, and an outer longitudinal layer. the maximum thickness is associated with the posterior area. The serosa is composed of richly vascularized and innervated connective tissue

Research microscopic morphology of lung in small ruminants

Goat lungs contain within their structure intrapulmonary airways consisting of intrapulmonary bronchi, bronchioles and terminal bronchioles composed of pulmonary lobules, respiratory alveolar ducts and alveoli of the lungs. In the pulmonary stroma the parenchymal gap is made up of loose connective tissue and outside the pulmonary alveoli. Extra-lobular bronchi within pulmonary stroma have the following histological structure: mucosa, lamina propria, muscular mucosal tunic and the fibrocartilagenous adventitia. The terminal bronchioles wall is formed by an epithelium that is simple cubic and Clara cell secretory granules that present the apical pole. Lamina propria is composed of smooth muscle and elastic fibers that gradually decrease and adventitia is reduced to extinction. Intralobular bronchioles or bronchi are located in the respiratory parenchyma lumen presents a characteristic festooned with pleats or folds mucosa showing longitudinal ciliated columnar epithelium simple with few goblet cells. In the respiratory bronchioles we find simple cubic epithelium and the alveolar epithelium is the ducts flattens. Alveoli presents a very thin wall papered by simple squamous epithelium. Noted that the interalveolar septum consists of two layers of squamous cells separated by thin elastic fibers, fiber cross-linking, typically the capillaries, connective matrix and cells of alveolar septal cells or macrophages. Alveolar macrophages are located between alveolar epithelial cells or inside the alveoli and presents an oval-shaped nucleus placed excentric. Alveolar epithelium shows cells arranged in a single row and consists of: First order pneumocytes or membranous pneumocytes, order II pneumocytes or pneumocytes granulosa with a brushed edge and alveolar macrophages. In the First-order alveolar cells they appear extremely flattened, with a heterochromatic nucleus that protrufes in the lumen and covers the alveoli. The second order alveolar cells appear interspersed among the first-order alveolar cells and appear clustered in interavleolar septa.They cubical spheroid core is centrally located and acidophile cytoplasm

Research on swine stomach histological structure

In histological examination we noticed histostructural pigs cheeks, as evidanced by the buccal mucosa, muscle layer and skin. Connective tissue is dense semimodelat, predominantly collagen fibres arranged in bundles. Seromucoase is observed numerous small glands, blood supply and innervation rich. Lingual mucosa, stratified squamous epithelium presents a slightly keratinized. Lingual mucosa appears smooth on the ventral side of the tongue and the lingual papillae on the dorsal presents represented: conical papillae, filliform papillae, fungiform papillae, papillae and buds tinted circumvalate. The tongue is an organ formed musculo-membranous striated muscle tissue oriented in different planes, blood vessels, nervous and glandular formations. The tongue has a stratified squamous epithelium covered with a slightly keratinized tissue, and in the back of the tongue called pappilae are very protruding. The buccal mucosa consists of stratified squamous epithelium keratinized slightly, showing a histostructural lamina propria of loose connective tissue and glands tubulo-acinar forming intramural salivary glands. With 10x objective type mucosa is observed on the dorsal sensory, stratified squamous epithelium is keratinized and lingual papillae are four types: filiform, fungiform, tinted and circumvalate. Lamina propria under the epithelium and consists of dense connective tissue, salivary glands are presented thin lingual mucous or mixed type. Body mass is mostly muscular, skeletal muscle consists of bundles arranged in different planes Tongue muscle consists of striated muscle fibres bundles sectioned longitudinal, transverse or horizontal. Striated muscle fibres are oriented in different planes, with characteristic cross-banding. Between striated muscle fibres of connective tissue, are present numerous fibroelastic, blood vessels and nerves