451 - 475 of 635
Number of results to display per page
TitleDescriptionSubjectCollection
451 Reactive promyelocyte during sepsis or chemotherapy in peripheral bood smear (human)Stain: May-Grnwald-Giemsa (MGG). Neutrophilic promyelocyte with toxic granulation and vacuolar degeneration. Note that nucleoli are still visible.Poja Histology Collection - Blood & Bone Marrow Subset
452 Red pulp of spleen with perfused venous sinusoids (human)Stain: Azan. Cross-sectioned venous sinusoids with splenic cord (1). The wall of a sinusoid is composed of elongated rod-like endothelial cells that are orientated parallel to each other in the long axis of the sinusoid. There is a discontinuous pale-stained basement membrane (difficult to observe i...sinusoid ; red pulp; splenic cord; central arteriolePoja Histology Collection - Lymphatic Tissues and Organs Subset
453 Red pulp of spleen with venous sinusoids (monkey, human)Stain: A: Silver stain (Movat) (monkey); B: Silver stain (Gomori) (human). (A): The darkly stained fibres are conspicuous in the PALS (1) area arranged in parallel rows. The blood vessels continue in the surrounding splenic sinusoids (4). The wall of the sinusoid is built as a grid, the space is su...sinusoid; reticular fibresPoja Histology Collection - Lymphatic Tissues and Organs Subset
454 Respiratory bronchiolus (human)Stain: Hematoxylin and eosin. A longitudinal section shows the lumen of a respiratory bronchiolus (1) with an irregular lining. It is covered by low columnar-cuboidal cells, a few pouches within the same lumen are lined by thin alveolar epithelium as found in the surrounding alveoli (2). Thin arrows...Respiratory bronchiolus; Columnar epithelium; Cuboidal epithelium; Clara cells; Alveolar epitheliumPoja Histology Collection - Respiratory System Subset
455 Respiratory bronchiolus (human)Stain: Azan. The lumen (1) shows an irregular lining. It is covered by low columnar-cuboidal cells (→). Alveolar pouches (*) within the same lumen are lined by thin alveolar epithelium as found in the surrounding alveoli (2). At (5) small patch of smooth muscle, (4) macrophages with phagocytized c...Respiratory bronchiolus; Columnar epithelium; Cuboidal epithelium; Alveolar epitheliumPoja Histology Collection - Respiratory System Subset
456 Respiratory bronchiolus (mouse)Stain: Hematoxylin and eosin. The lumen (1) shows an irregular lining and is covered by low columnar-cuboidal cells (↓), locally disrupted by a few areas with thin alveolar epithelium as found in the surrounding alveoli (2). Thick arrows point to a row of light-stained Clara cells. At (*) discont...Respiratory bronchiolus; Columnar epithelium; Cuboidal epithelium; Clara cells; Alveolar epitheliumPoja Histology Collection - Respiratory System Subset
457 Respiratory epithelial cells bordering the olfactory region in the nose (human)Electron microscopy. The five respiratory cells (1) show many cross-sectioned cilia (2) in the lumen. Basal bodies (arrow heads) are regularly arranged at the apex of these cells, and in between, short, slender microvilli. Electron-light cytoplasmic protrusions (3) between the cilia are olfactory bu...Respiratory epitheliumPoja Histology Collection - Respiratory System Subset
458 Respiratory epithelial cells in the nasal concha (rat)Scanning electron microscopy. Bushes of long cilia (1) are present on the top of the epithelial cells. In between clusters of microvilli-studded goblet cells (2) are visible.Respiratory epithelium; Pseudostratified epitheliumPoja Histology Collection - Respiratory System Subset
459 Respiratory epithelium in the nasal septum (rat)Electron microscopy. At the left pseudostratified epithelium (1) with ciliated columnar (light) cells and electron-dense basal cells (2). In the middle a wide venous capillary (3) with erythrocytes. At the lower part a serous area of a seromucous gland (4) with dark granules and well-developed rough...Respiratory epithelium; Basal cellsPoja Histology Collection - Respiratory System Subset
460 Respiratory epithelium in the nasal vestibulum (rat)Scanning electron microscopy. Note bushes of cilia (1) on the ciliary epithelium. In between areas of short microvilli-studded bulging or flattened goblet cells. Remnants of erythrocytes (2) are also found on top of ciliated cells.Respiratory epithelium; Nasal vestibulumPoja Histology Collection - Respiratory System Subset
461 Respiratory epithelium of trachea (human, adult, high magnification)Stain: Azan. The red-stained pseudostratified epithelium contains cilia and light goblet cells (white droplets) and a distinct basement membrane that continues in the intense blue-stained lamina propria and the submucosa consisting of fibrous tissue of elastic and collagenous fibers.Tracheal glands; Excretory duct; PerichondriumPoja Histology Collection - Respiratory System Subset
462 Respiratory region of nasal vestibulum (human, higher magnification)Stain: Azan. At the top pseudostratified, ciliated epithelium (1) with a distinct endoepithelial gland (2, pink-stained mucous cells). The proper lamina is cell-rich and draining ducts (3, enclosed by thicker blue-stained borders) and acini of the nasal glands (5) are present here as well as in the ...Pseudostratified epithelium; Nasal glands; Seromucous glands; Endoepithelial glandsPoja Histology Collection - Respiratory System Subset
463 Reticulocyte (peripheral blood, human)Electron microscopy. An anucleate reticulocyte with fimbriated processes (asymmetrical folding of the cell membrane) after nuclear extrusion. The cytoplasm contains a heavy amount of hemoglobin, electron-dense lysosomes, vesicular remnants as well as scattered clumped polysomes.Poja Histology Collection - Blood & Bone Marrow Subset
464 Reticulocytes in peripheral blood smear (human)Stain: Brilliant cresyl blue. The blue stained reticulum strands and aggregates (1) are ribosomal residues in the young red blood cells that just have expelled their nuclei. The reticulocytes are not to be confused with large Heinz bodies. Heinz bodies (↓, arrows) are red cell inclusions composed ...Poja Histology Collection - Blood & Bone Marrow Subset
465 Reticulocytes in peripheral blood smear (human)Stain: Brilliant cresyl blue. After expulsion of the erythroblastic nucleus the remaining cell is called reticulocyte. This staining visualizes the remained aggregated strands of polysomes as a fine network. The expulsed nucleus will be phagocytosed by macrophages and reticular cells in the bone mar...Poja Histology Collection - Blood & Bone Marrow Subset
466 Reticulocytosis in peripheral blood smear (human)Stain: May-Grnwald-Giemsa (MGG). The slightly pale blue stained cells (1) represent the reticulocytes. These young red blood cells are stained bluish because of the presence of ribosomal RNA.Poja Histology Collection - Blood & Bone Marrow Subset
467 Root of tooth within osseous socket - cross-section; human, adultStain: Hematoxylin and eosin. From left to right: bundle bone of alveolus; oblique fibers of periodontal ligament with blood vessels (broad layer); flattened cementoblasts settled on a thin light rim of cementoid; darker stained acellular cementum, the so-called acellular extrinsic fiber cementum a...oral cavity; acellular cementumPoja Histology Collection - Oral Cavity Subset
468 Sagittal section through tooth buds in jaws during tooth development - human, embryo, 6 weeks; low magnificationStain: hematoxylin and eosin. At the top the upper jaw (maxilla) opposite the lower jaw (mandible). At the right side part of the tongue in the oral cavity. Arrows point to epithelial proliferations (future tooth bud formation) that are surrounded by condensation of mesenchymal cells (neural crest m...oral cavity; tooth bud; tooth developmentPoja Histology Collection - Oral Cavity Subset
469 Scheme electron microscopy of the border of secondary nodule/red pulp in spleenThe left figure POJA-L974 shows a scheme of histological impression of a survey of a secondary splenic follicle or nodule. The rectangle is enlarged in the right figure POJA-L976B and shows the following elements: A. germinal centre; B. mantle zone; C. dendritic cell area; D. marginal zone; E. ...white pulp; marginal zone; red pulp; antigen presenting cell (APC)Poja Histology Collection - Lymphatic Tissues and Organs Subset
470 Scheme of circumvallate papillae of the tongue (human, adult)1. (circum)vallate papilla; 2. non-keratinized stratified squamous epithelium; 3. taste bud; 4. serous gland (von Ebner); 5. draining duct (of serous gland); 6. lingual muscleoral cavity; von Ebner; circumvallate papillaePoja Histology Collection - Oral Cavity Subset
471 Scheme of appendix ('gut-associated lymphatic tissue' or GALT) (human)Survey vermiform appendix (see also Digestive System: Appendix) A large amount of non-encapsulated diffuse lymphatic tissue or mucosa-associated lymphatic tissue (MALT) is located in the subepithelial lamina propria (e.g. respiratory passages, genitourinary tract). The gut-associated lymphatic tis...GALT; follicle; scheme; germinal centerPoja Histology Collection - Lymphatic Tissues and Organs Subset
472 Scheme of blood circulation in the red pulp in the spleenA. closed circulation B. open circulation A. The route of closed circulation proposes that blood empties from the capillaries directly into the splenic sinus. The central artery bifurcates into penicillar arterioles (1) and the blood slowly enters ensheathed capillaries, surrounded by agg...white pulp; marginal zone; red pulp; open circulationPoja Histology Collection - Lymphatic Tissues and Organs Subset
473 Scheme of compound glands in the oral cavity - human, adultA. parotid gland (serous gland) magnification x 350 objective. B. sublingual gland (mucous part) magnification x 350 objective. C. sublingual gland (mixed part) magnification x 350 objective. D. simplified scheme of compound serous/mucous gland. 1. myoepithelial cell; 2. serous acinus; 3. stri...oral cavityPoja Histology Collection - Oral Cavity Subset
474 Scheme of cross sectional tooth in alveolar bone - catA. Survey of tooth (in alveolar bone) magnification x 30 objective. B. Peripheral part of tooth (in alveolar bone) magnification x 300 objective. 1. radicular pulp; 2. odontoblast layer; 3. dentin (radial arranged dentinal tubules); 4. Tomes' granular layer; 5. cementum; 6. fibers of period...oral cavity; alveolar bonePoja Histology Collection - Oral Cavity Subset
475 Scheme of development of germinal centre in lymphatic nodule (human)A. primary nodule (or follicle) with mainly nave B lymphocytes and some memory cells, but no germinal centre; B. proliferation of lymphoblasts by mitosis (3,-->) and development of capillaries (*) in the centre of the follicle; C. so-called secondary nodule with lighter stained germinal centre wit...follicle; antigen stimulation; scheme; germinal centerPoja Histology Collection - Lymphatic Tissues and Organs Subset
451 - 475 of 635