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TitleDescriptionSubjectCollection
51 Small bronchus (golden hamster)Electron microscopy. Two ciliated cells with nuclei (1). Supranuclearly electron-dense lysosomes (2, lipofucsin) are present, the apical parts contain mitochondria (3) and cross-sections of cilia (4) and microvilli (5) are visible in the lumen (*). Two mucoid goblet cells with packed secretion gran...Ciliated epitheliumPoja Histology Collection - Respiratory System Subset
52 Striated duct of nasal gland (rat)Electron microscopy. At (1) lumen of duct, (2) indicates nucleus of lining epithelial cell. Note the abundancy and palisade-like arrangement of mitochondria (3) in the basolateral regions, in the light microscope visible as a fine striation, hence the name striated duct or intralobular duct. (4) ind...Nasal vestibulum; Nasal glands; Striated duct; Intralobular duct; Seromucous glandsPoja Histology Collection - Respiratory System Subset
53 Late terminal sac period of developing lung (human, fetus, low magnification)Stain: Hematoxylin and eosin. Cross-sections of a bronchus (1) with cartilage rings (2) closely associated with pulmonary arteries (3). The alveolar appearance is evident, and the open spaces represent future alveolar duct systems as well as alveolar sacs. The cellular septa are still thick due to n...Lung development; Terminal sac periodPoja Histology Collection - Respiratory System Subset
54 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
55 Survey of epiglottis (human)Stain: Azan. Centrally light-stained elastic cartilage (e). Lingual side (LI) is covered with squamous epithelium. At the laryngeal side (LA) the squamous epithelium usually turns into respiratory epithelium with seromucous laryngeal glands (*).Laryngeal gland; Oral cavityPoja Histology Collection - Respiratory System Subset
56 Lamellar body of a type II alveolar cell in the lung (dog)Electron microscopy. Extrusion of surfactant material out of a type II alveolar cell (pneumocyte II, great alveolar cell). After fusion of a multilamellar body (1) (cytosome) with the apical cell membrane (note microvilli 2) the electron-dense lamellar content or surfactant (consisting of phosphatid...Type II alveolar cell; Pneumocyte II; Multilamellar bodies; Cytosomes; Tubular myelinPoja Histology Collection - Respiratory System Subset
57 Pseudoglandular - canalicular period of developing lung (human, fetus)Stain: Azan. Part of a bronchus (1) with young cartilage (2). The hyaline cartilage presents solitary chondrocytes embedded in the blue intercellular substance surrounded by a perichondrium (3). Note that the bronchus as well as the bronchial tubes (4) show an apical position of the epithelial nucle...Lung development; Pseudoglandular period; Canalicular period; MesenchymePoja Histology Collection - Respiratory System Subset
58 Longitudinal section of trachea (human, adult)Stain: Azan. On top: the epithelium (1) is pseudostratified with cilia and goblet cells. The dense lamina propria (2, ↓, deep blue) is demarcated from the submucosa with seromucous tracheal glands (3). C-shaped cartilage rings (C, light blue) maintain patency. The cartilage edges are connected by ...Pseudostratified epithelium ; Seromucous glands; Tracheal glands; Fibroelastic membrane ; AdventitiaPoja Histology Collection - Respiratory System Subset
59 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
60 Nasal glands of the nasal vestibulum (rat, higher magnification)Electron microscopy. Part of a serous acinus of a seromucous nasal gland demonstrates the central lumen (*) formed by four gland cells. Note junctional complexes (↑) and the close proximity of the dense secretion granules (2) ready to be released into the central lumen. These active cells contain ...Nasal vestibulum; Seromucous glands; Nasal glands; Serous cells; Secretion granulesPoja Histology Collection - Respiratory System Subset
61 Pseudoglandular period of developing lung (human, embryo)Stain: Trichrome (Goldner). Cross-sectioned future bronchial tubes (1) of varying sizes, note the apical position of the nuclei with light-stained basal parts (glycogen). The surrounding mesenchyme condenses (↓) around the epithelium and in the neighbourhood small blood vessels (*) are present. At...Lung development; Pseudoglandular period; Bronchial tubes; MesenchymePoja Histology Collection - Respiratory System Subset
62 Pseudoglandular period of developing lung (human, embryo)Stain: Trichrome (Goldner). Cross-sectioned future bronchial tubes (1) of varying sizes, note the apical position of the nuclei with light-stained basal parts (glycogen). The surrounding mesenchyme becomes condensed (↓) around the epithelium and in between small blood vessels (*) are present.Lung development; Pseudoglandular period; Bronchial tubes; MesenchymePoja Histology Collection - Respiratory System Subset
63 Survey of cross-section through larynx-esophagus (human)Stain: Hematoxylin and bordeaux light. X = lumen of larynx (middle part); ↑ = esophagus (below) with an undulating mucosa covered with squamous epithelium. Elastic arythenoid cartilage (1); thyreoarythenoid muscle (2); thyroid cartilage (3); hyoid muscle (4).Arythenoid cartilagesPoja Histology Collection - Respiratory System Subset
64 Nostril area of nasal vestibulum - cutaneous region - humanStain: Azan. Slightly keratinized squamous epithelium (1) with thin red cornified layer; (2) hair follicles; (3) vibrissae and (4) associated sebaceous glands. At the bottom skeletal muscle fibers; (5) transverse part of the musculous nasalis; (6) connective tissue.Poja Histology Collection - Respiratory System Subset
65 Survey nasal septum (dog)Stain: Hematoxylin and eosin. The nasal septum consists of a cartilage skeleton present as one long (1, cartilago vomeronasalis) and two short plates (2, cartilago septi nasi) with centrally dark-stained areas of chondrocytes. Below, the distal tip is covered with keratinized stratified squamous epi...Squamous stratified epithelium; Nasal vestibulum; Venous sinusoids; Venous plexus; Swell bodiesPoja Histology Collection - Respiratory System Subset
66 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
67 Gross scheme of a lung lobule and its vascularization (human)Scheme of branching of intrapulmonary bronchus. A small intrapulmonal bronchus with cartilage rings (1) divides into bronchioli (2), at (3) the terminal bronchioli that continues into respiratory bronchioli (4) followed by alveolar ducts (5) and at (6) the alveoli. A respiratory bronchiolus with alv...Intrapulmonary bronchus; Bronchioli; Alveolar ducts; Lymphatic plexus; Visceral pleuraPoja Histology Collection - Respiratory System Subset
68 Olfactory mucosa in the nose (dog)Stain: Iron Hematoxylin and eosin (Heidenhain). The pseudostratified epithelium of the olfactory mucosa contains sensory cells, support cells and basal cells. The upper darker stained nuclei (1) belong to the supporting (sustentacular) cells showing a dark apical line (↑) at the top. Below lighte...Bowman glands; Olfactory glands; Olfactory mucosa; Pseudostratified epitheliumPoja Histology Collection - Respiratory System Subset
69 Olfactory gland (Bowman) in olfactory region of concha (human)Electron microscopy. Beneath the olfactory epithelium tubuloalveolar glands of Bowman (1) are found containing cells that produce dense secretion granules arranged around a large lumen (*) with greyish secretion product. These cells produce a serous fluid in which odoriferous substances are dissolve...Olfactory epithelium; Bowman glands; Olfactory glands; Secretion granulesPoja Histology Collection - Respiratory System Subset
70 Olfactory epithelium in the nose (human)Electron microscopy. At the top (lumen) cross-sections of olfactory bulbs (1) (vesicles) with cilia/basal bodies. Sustentacular (supporting) cells (2) exhibit numerous microvilli in the lumen, their cytoplasms contain many dispersed mitochondria and in the lower half aggregations of endoplasmic reti...Olfactory epithelium; Olfactory vesiclePoja Histology Collection - Respiratory System Subset
71 Alveolar sac in the lung (human)Stain: Azan. Characteristic alveolar tips (arrows) of neighbouring thin-walled alveoli (1). The tips contain elastin masked by collagen (blue-stained). At (2) small pulmonary arteries.Alveolar tipsPoja Histology Collection - Respiratory System Subset
72 Capillary system of lung alveoli (cat)Stain: specimen injected with trypan blue in gelatin via the pulmonary system. In a tangential view the blue-stained dense capillary plexus surrounding each alveolus is well depicted.Poja Histology Collection - Respiratory System Subset
73 Capillary system of an alveolus (cat)Stain: specimen injected with trypan blue in gelatin via the pulmonary system. In a tangential view the blue-stained dense capillary plexus of one alveolus is well shown.Poja Histology Collection - Respiratory System Subset
74 Type II alveolar cell in the lung (rat)Electron microscopy. At the top the alveolar space (1) is lined by a type II alveolar cell (pneumocyte II) (2) with blunt microvilli. In the cytoplasm the characteristic electron-dense multilamellar bodies (*) and light-stained swollen mitochondria are present. The lamellar bodies are responsible fo...Pneumocyte I; Pneumocyte II; Alveolar cell type I; Alveolar cell type II; Multilamellar bodies; Interstitial cellsPoja Histology Collection - Respiratory System Subset
75 Bullous emphysema of the lung (honeycomb lung, human, adult)Macroscopy of the left lung showing large apical bullae (3) due to total destruction of all alveoli leaving remnants of the covering pleura. (2) indicates small bullae of foci of destroyed lobules with permanent enlargement of the air spaces and (1) points to spots of anthracosis in less-affected lu...Macroscopy; Honeycomb lung; Interstitial fibrosis; Hamman-Rich SyndromePoja Histology Collection - Respiratory System Subset
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