Health Education Assets Library (HEAL)
 
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TitleDescriptionSubjectCollection
126 Parotid gland (rat)Electronmicroscopy. Part of a serous acinus with characteristic secretion granules supranuclearly. Note different densities of the granules without any signs of fusion.oral cavity; serous glandPoja Histology Collection - Oral Cavity Subset
127 Permanent tooth - canine, human, adult; low magnification of labiolingual sectionStain: Hematoxylin and scarlet red. From top to bottom: Crown region with dentin but without enamel (decalcified specimens); Neck region at the attachment of the gingiva to dentin (left and right); Cementum is visible as a dark small rim from the neck region to the bottom of the tooth; Periodontal l...oral cavity; alveolar processPoja Histology Collection - Oral Cavity Subset
128 Premolar permanent tooth (human, adult; low magnification of labiolingual section)Stain: Hematoxylin and eosin. From top to bottom: Crown region with enamel-dentin boundary (there is no enamel present in decalcified specimens); dentin (blue-pink) enwraps the whole pulp chamber (light) and here the lines of dentinal tubules appear S-shaped. Neck region at the attachment of the gin...oral cavity; pulp canalPoja Histology Collection - Oral Cavity Subset
129 Periodontal ligament with epithelial rests of Malassez - longitudinal section of root of tooth; human, adultStain: Hematoxylin and eosin. From left to right: connective tissue of periodontal ligament with epithelial rests of Malassez as the persistent remnants of the epithelium of Hertwig's epithelial root sheath. The three islets close to the cemental zone are slightly darker stained (note cluster of nuc...oral cavity; cementoblasts; Sharpey's fibers; acellular cementumPoja Histology Collection - Oral Cavity Subset
130 Predentin formation at the cuspal tip in tooth development - bell stage, human, embryoStain: Azan. From top to bottom: Stellate reticulum consisting of a network of ectoderm-derived cells; Cell layers of the stratum intermedium; Columnar (presecretory) ameloblasts with their upper side (nuclear area) in close contact with the stratum intermedium, and at the distal side (secretion are...oral cavity; predentinPoja Histology Collection - Oral Cavity Subset
131 Periodontal ligament with epithelial rest of Malassez - longitudinal section of root of tooth, higher magnification; human, adultStain: Hematoxylin and eosin. Centrally within the connective tissue of the periodontal ligament a distinct darker stained epithelial islet with nuclei is present (epithelial rest of Malassez as a remnant of Hertwig's epithelial root sheath; in adults it might produce dental cyst). At the right side...oral cavity; cementoblasts; epithelial rest of Malassez; cementoidPoja Histology Collection - Oral Cavity Subset
132 Presecretory ameloblasts in tooth development - bell stage, gerbil, postnatalElectronmicroscopy. Well-arranged epithelial formation of presecretory ameloblasts (active nuclei) with their distal secretion sides towards the thin grey basal lamina. Predentin at the bottom close to the basal lamina and comprises collagen fibers, odontoblastic extensions and dispersed calcified m...oral cavity; predentin; matrix vesiclesPoja Histology Collection - Oral Cavity Subset
133 Presecretory ameloblast in tooth development - mammalian embryoScheme electronmicroscopy. The ectodermal-derived cell appears as tall columnar with fingerlike extensions (dependent on the development stages) at their distal side (secreting area = 'functional base'). These extensions are formed as the cell withdraws during the production of initial enamel. The s...oral cavityPoja Histology Collection - Oral Cavity Subset
134 Pulpo-dentinal complex - segment of a tooth; human, adultStain: Hematoxylin and eosin. At the pulp-dentin border the peripheral pulp appears to be a specialized odontogenic region composed of odontoblasts, a cell-free zone and a cell-rich zone. From left to right: dentin (note striation due to dentinal tubules); (uncalcified) light stained predentin. At t...oral cavity; Tomes' Fibers; dentinal tubules; predentinPoja Histology Collection - Oral Cavity Subset
135 Pulpo-dentinal complex of the tooth (human, adult).Stain: Hematoxylin and eosin. At the pulpo-dentinal border the peripheral pulp appears to be a specialized odontogenic region composed of odontoblasts, a cell-free zone and a cell-rich zone; from left to right: Dentin (note striation due to dentinal tubules). (Uncalcified) Light stained predentin. A...oral cavity; Tomes' Fibers; dentinal tubules; predentinPoja Histology Collection - Oral Cavity Subset
136 Pulp stones in root of tooth - longitudinal section, human, adultStain: Hematoxylin and eosin. Left and right side dark stained dentin with a small light rim of predentin. Centrally pulp stones represent as free lying irregular calcifications. They are found diffusely distributed as spots or as thin strands following blood vessels and bundles of collagen fibers i...oral cavity; pulp stone; diffuse calcificationsPoja Histology Collection - Oral Cavity Subset
137 Pulp chamber of tooth - human, adultStain: Hematoxylin and eosin. Pulpal connective tissue is a special type of tissue (stromal tissue) with so-called stellate-shaped pulpal fibroblastic cells that produce growth factors, extracellular matrix including thin collageneous proteins. Blood vessels are small and thin-walled; macrophages an...oral cavity; pulp chamber; pulp fibroblastPoja Histology Collection - Oral Cavity Subset
138 Pulpo-dentinal complex in longitudinal section of tooth - damaged dentin, human, adultStain: Hematoxylin and eosin. If odontoblastic processes are damaged, (e.g., erosion, caries, etc.), the entire cell will degenerate, though it may be able to produce dentin. From left to right: - irregular course of dentinal tubules; - light stained (damaged) area contain no tubules; - pulp connect...oral cavityPoja Histology Collection - Oral Cavity Subset
139 Pulpo-dentinal complex in longitudinal section of tooth - secondary dentin, human, adultStain: Hematoxylin and eosin. From left to right: - dentinal tubules as fine striation in dentin; - vertical course of incremental lines (von Ebner); - a darker stained broad zone of secondary dentin; - pulp chamber with crowding of odontoblasts close to secondary, newly formed dentin; - connective ...oral cavity; secondary dentinPoja Histology Collection - Oral Cavity Subset
140 Pulp canal of tooth - longitudinal section; human, adultStain: Hematoxylin and eosin. Centrally three thick nerve bundles. In between blood vessel filled with erythrocytes. At the right side longitudinal course of slender thin-walled blood vessels (arterioles) which pass into thin-walled capillaries with a wide lumen.oral cavity; pulp canalPoja Histology Collection - Oral Cavity Subset
141 Renal corpuscleThis section of renal corpuscle clearly shows the glomerulus with vascular and urinary poles. Adjacent to the vascular pole is the macula densa region of the distal tubule. At the urinary pole, the proximal convoluted tubule drains the urinary space.Renal CorpuscleHEAL Reviewed Collection
142 Renal corpuscleThe section of renal corpuscle includes the parietal layer of the renal capsule, urinary space and glomerulus. The vascular pole and macula densa region of the distal tubule are represented.Renal CorpuscleHEAL Reviewed Collection
143 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
144 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
145 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
146 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
147 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
148 Renal corpuscleThis section of renal corpuscle shows the glomerulus with vascular pole and macula densa region of the distal tubule. At the urinary pole, the proximal convoluted tubule can be seen draining the urinary space.Renal CorpuscleHEAL Reviewed Collection
149 Scheme of electron microscopy of tertiary villus (human placenta, midpregnancy)(See also POJA-L1227). (A) Survey and (B) detail of a tertiary placental villus lined by the multinucleated syncytiotrophoblast cell (1) (STC). The apex shows protrusions and extensive microvilli of varying sizes (brushborder, 2). Nuclei are sectioned at different levels and the cytoplasm contains a...placenta; tertiary villi; placental barrier; electron microscopyPoja Histology Collection - Placenta
150 Scheme of tongue papillae and foliate papillaeA. Circumvallate papillae (tongue, human, adult) magnification x 35 objective. B. Foliate papillae (tongue, rabbit) magnification x 85 objective. C. Taste bud in foliate papilla (tongue, rabbit) magnification x 750 objective. 1. (circum)vallate papilla; 2. non-keratinized stratified squamous epit...oral cavity; von Ebner; circumvallate papillae; foliate papillaePoja Histology Collection - Oral Cavity Subset
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