The Health Education Assets Library (HEAL) is a collection of over 22,000 freely available digital materials for health sciences education. The collection is now housed at the University of Utah J. Willard Marriott Digital Library.
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Filters: Collection: "ehsl_heal"
| Title | Description | Subject | Collection | ||
|---|---|---|---|---|---|
| 26 |
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Scheme of palatine and pharyngeal tonsils ('lymphoepithelial tissues') (human) | The palatine tonsils are covered by the multilayered, non-keratinizing squamous epithelium of the oral cavity (A-1). In contrast to the palatine and lingual tonsils, the epipharyngeal tonsil has a multilayered ciliated epithelium (respiratory-like epithelium, B-9). The Waldeyer's tonsillar ring i... | germinal center; scheme; follicle | Poja Histology Collection - Lymphatic Tissues and Organs Subset |
| 27 |
 |
Scheme of reticular tissue in lymph node | Lymph node stroma does not contain stromal cells but instead the reticular meshwork is build by reticular cell types, macrophages and lymphoid cells and myeloid cells. Route (A) in the scheme represents morphological differentiation path from B lymphocytes to plasma cells. 1 endothelial ce... | reticular tissue; scheme; follicle; germinal center | Poja Histology Collection - Lymphatic Tissues and Organs Subset |
| 28 |
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Section of lymph node (human) | Stain: Silver stain (Gomori). Due to the argyrophilia the reticular fibers are black-stained. They are derived from the fibrous capsule and penetrate into the deep cortex (i.e. paracortical area) and are embedded among other fibers such as collagen type III, IV. Note the postcapillary venules (*) ... | high endothelial venule (HEV); paracortex; argyrophilia; paracortex | Poja Histology Collection - Lymphatic Tissues and Organs Subset |
| 29 |
 |
Spiral artery in endometrium (human, midpregnancy) | Stain: Hematoxylin-eosin. (A) cross-sections of spiral arteries in endometrium. (B) semi-polarized section of part of a spiral artery. Dark-stained large trophoblast cells (3), partly replacing the cuboidal hypertrophic (B2) endothelial cells. (4) smooth muscle cells. (L) lumen of vessel with cell... | placenta; spiral artery; endometrium; trophoblast | Poja Histology Collection - Placenta |
| 30 |
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Survey and details of palatine tonsil ('lymphoepithelial tissues', 'gut-associated lymphatic tissue' or GALT) (human) | Stain: Azan. The survey in (A) shows that the palatine tonsil (localized in the lateral wall of the oropharynx) consists of crypts (1) and folds of the surface epithelium (stratified squamous) surrounded by accumulations of lymphoid cells organized in follicles (2). (B): the lining epithelium (5) i... | stratified squamous epithelium | Poja Histology Collection - Lymphatic Tissues and Organs Subset |
| 31 |
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T cell depletion in lymph nodes (dog) | Stain: Trichrome (Goldner). Left and right: survey of lymph nodes. A: lymph node after treatment with anti-thymocyte-antiserum (ATS); B: normal, untreated lymph node ATS treatment results in a considerable depletion of the T cells in the paracortical area (2), while also the germinal centre (1) i... | T cell depletion; follicle; medulla; paracortex | Poja Histology Collection - Lymphatic Tissues and Organs Subset |
| 32 |
 |
Tertiary villi (human placenta, midpregnancy) | (A) Lower and (B) higher magnification. Stain: Hematoxylin - azophloxine. (C) electron microscopy of Hofbauer cell. (A, B) show tertiary villi and intervillous spaces. Squeezed between villi fibrinoid clots (1). The large arrow (2) points to either a detached, free circulating large STC (syncyt... | placenta; chorionic villi; Hofbauer cell; fibrinoid; syncytiotrophoblast | Poja Histology Collection - Placenta |
| 33 |
 |
The effect of cyclophosphamide on the resident macrophages in thymus (rat) | Stain: Immunoperoxidase staining with diaminobenzidin (DAB) and hematoxylin counterstained on frozen section. A single injection with cyclophosphamide (CP, 70 mg/ml) induces a transient cortical involution after 4 days. The darkly stained cortex of th normal thymus (A1, A2) decreases its dark stain... | cyclophosphamide; ED1 macrophages ; immunosuppression; lymphoid tissue | Poja Histology Collection - Lymphatic Tissues and Organs Subset |
| 34 |
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The effect of cyclophosphamide on B cells in spleen (rat) | Stain: Immunofluorescence of Vector red using Mark-1 antibody against B cells. A: Normal rat spleen. (1) the dark, unstained area represents the PALS (periarteriolar lymphatic sheath) filled with T cells. (2) red-stained germinal centre of a B cell follicle that is surrounded by the marginal zone (3... | cyclophosphamide; immunosuppression; immunofluorescence; B lymphocytes | Poja Histology Collection - Lymphatic Tissues and Organs Subset |
| 35 |
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Tertiary villi (human placenta, full-term, cross-section) | Stain: Hematoxylin ? azophloxine. A few tertiary villi (1) within the intervillous space (2) contains capillary (3) and embryonic connective tissue (*). It remains covered by the postmitotic multinucleated syncytiotrophoblast cell (STC, 4). Distinct nuclear accumulation in the STC indicates the so-c... | placenta; tertiary villi; syncytiotrophoblast | Poja Histology Collection - Placenta |
| 36 |
 |
Tubal tonsil (human) | Stain: Azan. The tubal tonsil consists of a collection of lymphoid nodules near the auditory tube opening and forms part of the Waldeyers ring of defense in the nasopharyngeal cavity. This tonsil has fewer crypts (1), and the surface is covered by one to more layered ciliated epithelium (2). The la... | tubal tonsil; nasopharynx | Poja Histology Collection - Lymphatic Tissues and Organs Subset |
| 37 |
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Villi of complete hydatidiform mole (human) | (A) Macroscopy aggregation (1) of abnormal villi of hydatidiform mole intermingled with blood clots (2). (B) After dissection of a complete mole grape-like aggregations of dilated chorionic villi are presented as numerous liquid-filled vesicles (1) varying in diameters (from few mm up to 1 cm) surr... | placenta; trophoblast; hydatiform mole | Poja Histology Collection - Placenta |
| 38 |
 |
Trophoblast cell in lung alveolar interstitium (human, early midpregnancy) | Stain: Hematoxylin-eosin. It is well known that free circulating trophoblast cells can be found migrated into lung parenchyma during normal pregnancy. In this sample a large trophoblast cell (→) is localised within the normal alveolar interstitium. Alveolar phagocytes (*) are present in the alve... | placenta; trophoblast; lung | Poja Histology Collection - Placenta |
| 39 |
 |
Epithelial lining of trachea and bronchiolus (mammals) | Left side trachea: Columnar ciliated cells (1) with up to 200 motile cilia with an organelle-rich apex and in the middle a goblet cell (2) with accumulation of mucus secretion granules in the apex. Note that all epithelial cells (i.e., junctions) contact the basal lamina. Four basal cells (3) do not... | Bronchiolus; Pseudostratified epithelium; Ciliated epithelium; Clara cells; Basal cells; Neuro-endocrine cells | Poja Histology Collection - Respiratory System Subset |
| 40 |
 |
Air-blood barrier in the lung (mammals) | Scheme electron microscopy. (1, ↓) Represents type I pneumocytes lining alveolar spaces (A). Cell (2) represents a free alveolar macrophage. The type II pneumocyte (3) is adherent to type I pneumocyte extensions (note junctional connection), and contains multilamellar bodies (surfactant). A myofib... | Pneumocyte type I ; Pneumocyte type II | Poja Histology Collection - Respiratory System Subset |
| 41 |
 |
Neuroepithelial body in terminal bronchiolus (golden hamster) | Electron microscopy. Three epithelial cells, as part of the N(euro) E(pithelial) B(ody), contribute to a cluster of neuroendocrine cells. They belong to the Amine Precursor Uptake and Decarboxylation cell system so-called APUD cells. The dense-core granules (↓) contain among others dopamine or ser... | Terminal bronchiolus ; Neuro-endocrine cells | Poja Histology Collection - Respiratory System Subset |
| 42 |
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Keratin 7 in the bronchial epithelium of the lung (human, adult) | Stain: anti-keratin 7 antibody (Pan-Ck 7) immunoperoxidase staining (with aminoethylcarbazole (AEC) substrate). The epithelium of the bronchus (1) stains dark brown-red after the reaction with AEC indicating a positive reaction for cytokeratin 7. This antibody can be used in the study of development... | Bronchiolus; Immunoperoxidase; Immuno-reaction | Poja Histology Collection - Respiratory System Subset |
| 43 |
 |
Surface of olfactory epithelium (rat) | Electron microscopy. Bottom left shows an olfactory bulb (1, vesicle) with cross-sectioned basal bodies. Right side part of the apex of a supporting cell (2) with microvilli (3). Parallel to the surface of the epithelium one long olfactory cilium (4) and several other cross-sectioned ones are detect... | Olfactory epithelium; Olfactory vesicle | Poja Histology Collection - Respiratory System Subset |
| 44 |
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Alveolar cells in the lung (mammals) | Scheme electron microscopy. (5) alveolar space; (6) type I Pneumocyte; (7) basal lamina; (8) myofibroblast; (9) collagen and elastin fibers; (10) mesothelial cell of the visceral pleura; (11) capillary with erythrocyte; (12) endothelial cell lining the capillary; (13) type II pneum... | Pneumocyte type I ; Pneumocyte type I I | Poja Histology Collection - Respiratory System Subset |
| 45 |
 |
Scheme of the epiglottis (human, adult) | The laryngeal side of the epiglottis (1) is covered with respiratory epithelium, while the lingual side (2) is similar to the oral cavity epithelium (squamous type). The transitional zone to respiratory epithelium is marked by (3). The scaffold consists of elastic cartilage (4). Seromucous laryngea... | Laryngeal glands; Oral cavity | Poja Histology Collection - Respiratory System Subset |
| 46 |
 |
Epithelial lining of bronchiolus in the lung (rat) | Scanning electron microscopy. Bushes of cilia indicate the presence of ciliated cells (1). Clustered non-ciliated cells (2, Clara cells) are dome-shaped with stubby microvilli at the surface, they protrude into the lumen to the tips of the cilia. | Bronchiolus ; Ciliated epithelium ; Clara cells | Poja Histology Collection - Respiratory System Subset |
| 47 |
 |
Transitional region of epiglottis (human, high magnification) | Stain: Hematoxylin and eosin. Transition of squamous epithelium into pseudostratified epithelium. Note diapedesis of lymphocytes (darker stained rounded cells) through the epithelial barrier (→). The proper lamina presents some lymphocyte infiltration. | Diapedesis | Poja Histology Collection - Respiratory System Subset |
| 48 |
 |
Keratin 7 in the lining alveolar epithelium of the lung (human, adult) | Stain: anti-keratin 7 antibody (Pan-Ck 7) immunoperoxidase staining (with aminoethylcarbazole (AEC) substrate). Both alveolar epithelial cell types I (1) and II (2) stain dark brown-red after the reaction with AEC indicating a positive reaction for cytokeratin 7. Note the white (non-stained) capilla... | Pneumocyte I; Pneumocyte II; Imunoperoxidase; Immuno-reaction | Poja Histology Collection - Respiratory System Subset |
| 49 |
 |
Arbor bronchialis, the bronchial tree (human, adult) | Resin corrosion cast of the lower trachea and bronchial tree (posterior aspect). The lobar and segmental bronchi and their main branches are coloured, different colours indicate areas supplied by different segmental bronchi. White-coloured lower trachea (Tr) divides into two principal bronchi (Bp)... | Segmental bronchi ; Macroscopy | Poja Histology Collection - Respiratory System Subset |
| 50 |
 |
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 epithelium | Poja Histology Collection - Respiratory System Subset |