Health Education Assets Library (HEAL)
 
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TitleDescriptionSubjectCollection
26 Detail of lamellar body (surfactant) and type I alveolar cell in lung (rat)Electron microscopy. After fixation the extracellular lining of surfactant (phosphatidylcholine, phosphoglycerol, cholesterol and proteins) will often be present as free packed lamellae in the alveolar space (4). This so-called tubular myelin is observed as stacks (5) of lipid crystals and aqueous l...Pneumocyte I ; Pneumocyte II; Alveolar cells; Tubular myelinPoja Histology Collection - Respiratory System Subset
27 Developing conchae in a frontal section of head (pig, fetus)Stain: Azan. The fetal conchae develop like a branched gland (1) within the blue-stained trabecular bone (2) of the future skull. The fetal skin (3) is present at the top and bottom. Groups of cheek musculature (4) in middle left and right side. A broad sleeve of chin muscles below (5). The developi...Conchae nasales; Trabecular bonePoja Histology Collection - Respiratory System Subset
28 Elastic fibers in the lung (human)Stain: Orcein. At the left (1) several alveoli (A) are depicted with a faint staining of cellular elements. The elastic fibers within the alveoli are stained reddish-purple. At the right (2) a high magnification of a tangential-sectioned alveolus shows the thicker bundles as well as very thin branch...Elastic fibersPoja Histology Collection - Respiratory System Subset
29 Elastin close near the alveolar tip in lung tissue (human, adult)Electron microscopy. The alveolar tip in the alveolar spaces (Alv) is covered with flattened type I alveolar cells (2). The arrows at (↓1) indicate the junctions between these flattened cells. The amorph elastin (*) in the alveolar tip appears more electron-dense than the collagen fibers (Col). No...Type I alveolar cells; Elastin-associated proteinsPoja Histology Collection - Respiratory System Subset
30 Elastin in alveolar tip in lung tissue (human, adult)Immuno-electron microscopy (embedded in Lowicryl HM 20). The amorph elastin (E) appears pale after embedding in this type of resin, but is antibody-labeled with electron-dense gold particles of 10 nm. (Col) indicate bundles of collagen fibers which are intermingled with swollen cytoplasmic extension...Alveolar cell type I; Myofibroblast; Immuno-electron microscopy; Immuno-stainingPoja Histology Collection - Respiratory System Subset
31 Elastin in alveolus of lung tissue (human, adult)Immuno-electron microscopy (embedded in Lowicryl HM 20). Elastin (E) is labeled with electron-dense gold particles of 10 nm. Note that the amorph elastin appears pale after embedding in this type of resin. (A) indicates alveolar space, (F) unlabelled myofibrolast, (C) collagen fibers, and (1) the th...Alveolar cells type I; Myofibroblasts; Immuno-electron microscopy; Immuno-stainingPoja Histology Collection - Respiratory System Subset
32 Elastin in alveolus of lung tissue (human, adult)Immuno-electron microscopy (embedded in Lowicryl HM 20). The amorph elastin (E) appears pale after embedding in this type of resin, but is antibody-labeled with electron-dense gold particles of 10 nm. (C) indicate bundles of collagen fibers (unlabeled) which are intermingled with swollen cytoplasmic...Immuno-staining; Immuno-electron microscopyPoja Histology Collection - Respiratory System Subset
33 Elastin in lung arteriole (human, adult)Immuno-electron microscopy (embedded in Lowicryl HM 20). The alveolar septa contain a muscular pulmonary arteriole (lumen = X) with unlabelled endothelial cells (1). The elastic membranes in the arteriolar walls consist of more or less continuous bands of amorphous elastic lumps (E) antibody-labeled...Alveolar septum; Immuno-electron microscopy; Immuno-stainingPoja Histology Collection - Respiratory System Subset
34 Embryonic FoldingUpon completing the module, you should be able to answer the following questions: How does embryonic folding give rise to a cylindrical embryo from a trilaminar germ disc? Along what axis does folding occur? Where do specific tissues of the embryo, e.g., ectoderm, mesoderm, and endoderm come to lie ...Embryonic Folding; Connecting Stalk; Gut TubeHEAL Reviewed Collection
35 Epiglottis (human)Stain: Hematoxylin and eosin. Stratified squamous epithelium (1) at the laryngeal side (top). Lymphocyte accumulation (2) in the lamina propria. Below elastic cartilage (3) and seromucous laryngeal glands (4) with draining ducts.Squamous epithelium; Laryngeal glandsPoja Histology Collection - Respiratory System Subset
36 Epithelial lining of bronchiolus in the lung (mammalia)Scheme electron microscopy. Two major cell types line a bronchiolus, a more cuboidal shaped ciliated one (1) that also exhibits microvilli with many organelles (including electron-dense lysosomal structures). The non-ciliated cells (2, Clara cells) appeared taller and dome-shaped and protrude into t...Bronchiolus; Ciliated epithelium; Clara cellsPoja Histology Collection - Respiratory System Subset
37 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 cellsPoja Histology Collection - Respiratory System Subset
38 Epithelial lining of respiratory bronchiolus in the lung (gerbil)Electron microscopy (low magnification). Two major cell types line a bronchiolus: a cuboidal-shaped ciliated one that exhibits microvilli with many organelles (1); the non-ciliated cells (2, Clara cells) are taller and are well provided with numerous electron-grey and smaller electron-dense secretor...Respiratory bronchiolus; Ciliated epithelium; Cuboidal epithelium; Clara cells; Secretory granulesPoja Histology Collection - Respiratory System Subset
39 Epithelial lining of respiratory bronchiolus in the lung (rat)Electron microscopy (low magnification). The epithelial lining of the respiratory bronchiolus contains ciliated cells (1) and Clara cells (2) with electron-dense secretory granules. At (4) interstitium with elastin, collagen and myofibroblasts; (5) shows a small pulmonary arteriole. At arrow (→) a...Respiratory bronchiolus; Ciliated epithelium; Clara cells; Secretory granules; Pneumocytes; Alveolar cells; InterstitiumPoja Histology Collection - Respiratory System Subset
40 Epithelial lining of terminal bronchiolus (golden hamster)Electron microscopy (low magnification). Two major epithelial cell types line the bronchiolus: (1) the ciliated cells with many organelles, and (2) the non-ciliated cells or Clara cells well provided with organelles, especially agranular endoplasmic reticulum and depending on their activity, numerou...Terminal bronchiolus; Ciliated epithelium ; Clara cells; Neuro-endocrine cells; Pneumocytes; Alveolar cell types; InterstitiumPoja Histology Collection - Respiratory System Subset
41 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 cellsPoja Histology Collection - Respiratory System Subset
42 Epithelium of respiratory bronchiolus (detail, human, high magnification)Stain: Azan. An irregular lining of low columnar-cuboidal cells (1) and thin alveolar epithelium (2) are present. Note cuboidal Clara cells (↓). At (3) small patches of smooth muscles and at (4) macrophages with phagocytized carbon particles (black dots). Small pulmonary artery (5), lymph capillar...Respiratory bronchiolus; Cuboidal epithelium; Alveolar epithelium; Lymph capillaryPoja Histology Collection - Respiratory System Subset
43 Epithelium of trachea (golden hamster)Electron microscopy. Columnar ciliated cells (1) with cilia and organelle-rich apex; a goblet cell (2a) with accumulation of mucous secretion granules supranuclearly. Another goblet cell (2b) appears deprived; one basal cell (3) does not extend to the free surface. Light-grey aggregations of elastin...Respiratory epithelium ; Pseudostratified epithelium; Basal cellsPoja Histology Collection - Respiratory System Subset
44 Epithelium of trachea (mammals, common respiratory epithelium)Scheme electron microscopy. 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 (...Respiratory epithelium ; Pseudostratified epithelium; Basal cellsPoja Histology Collection - Respiratory System Subset
45 Extraocular Skeletal Muscle-induced Eye MovementsThe tutorial simulates eye movements provoked by the contraction of individual and synergistic extraocular skeletal muscles. The courseware was designed to stimulate self-directed and problem-based, local and distance learning. It complements didactic and practical (dissection) activities of beginne...Extraocular Skeletal MuscleHEAL Reviewed Collection
46 Fibrillin in the alveoli in lung tissue (human, adult)Stain: imunoperoxidase staining with anti-fibrillin antibodies and diaminobenzidin reaction (frozen section). Fibrillin is one of the elastin-associated microfibrillar proteins that wraps the elastin protein core and is localized in normal lung structures such as alveolar septa and tips. The immuno-...Alveolar tips; Elastin-associated proteins; FibrillinPoja Histology Collection - Respiratory System Subset
47 Fibrillin in the alveoli of lung emphysema (human, adult)Stain: antifibrillin antibody immunoperoxidase staining with diaminobenzidin reaction. Fibrillin is one of the elastin-associated microfibrillar proteins, and marks therefore also the presence of elastin in lung tissue. In centrilobular emphysema (e.g., in lungs of smokers) the lesions are more com...Alveolar septa; Elastin-associated proteins; FibrillinPoja Histology Collection - Respiratory System Subset
48 Fibrillin in the alveoli of lung emphysema (human, adult)Stain: antifibrillin antibody immunoperoxidase staining with diaminobenzidin reaction. Fibrillin is one of the elastin-associated microfibrillar proteins, and marks therefore the presence of elastin in lung tissue. In centrilobular emphysema (e.g., in lungs of smokers) the lesions are more common an...Alveolar tips; Elastin-associated proteins; FibrillinPoja Histology Collection - Respiratory System Subset
49 Fibrillin in the alveoli of the lung (human, adult)Stain: antifibrillin antibody immunoperoxidase staining with diaminobenzidin reaction. Fibrillin is one of the elastin-associated microfibrillar proteins. Here fibrillin (and elastin) is localized as brown threads in the alveolar septa and alveolar tips (1). The elastin is visible as white threads (...Alveolar tips; Elastin-associated proteins; FibrillinPoja Histology Collection - Respiratory System Subset
50 Free surfactant (tubular myelin) in alveolar space of the lung (rat)Electron microscopy. After fixation the extracellular lining of surfactant (phosphatidylcholine, phosphoglycerol, cholesterol and proteins) will often be present as free packed lamellae in the alveolar space. This so-called tubular myelin (partly cross-sectioned), (1) is observed as stacks of lipid ...Pneumocyte II; Tubular myelinPoja Histology Collection - Respiratory System Subset
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