Health Education Assets Library (HEAL)
 
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TitleDescriptionSubjectCollection
126 Survey of bronchus and lung parenchym (human, adult)Stain: Azan. (1) Lumen of small bronchus beside a lumen of pulmonary artery (2). Thin plates of hyaline cartilage (3) and connective tissue surrounding (1) and (2). Arrows (→) indicate lung alveoli with black-stained patches of carbon deposits. (4) Lung parenchym with alveoli.Lung parenchymPoja Histology Collection - Respiratory System Subset
127 Survey of bronchus and lung parenchym (human, adult)Stain: Azan. Lumina of bifurcated bronchi (1, 2). Thin plates of hyaline cartilage (3) and connective tissue surround the bronchi. Arrows (→) indicate lung alveoli with black-stained patches of carbon deposits. (4) Lung parenchyma with alveoli.Lung parenchymPoja Histology Collection - Respiratory System Subset
128 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
129 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
130 Survey of epiglottis (human)Stain: Azan. Centrally light-stained elastic cartilage (4). Lingual side (2) is covered with squamous epithelium. At the laryngeal side (1) the squamous epithelium usually turns into respiratory epithelium with seromucous laryngeal glands (5). Note also lymphoid aggregations in this area (3 →).Oral cavity; Laryngeal glandsPoja Histology Collection - Respiratory System Subset
131 Survey of lung parenchym (gerbil)Scanning electron microscopy. The photograph shows (1) bifurcation of several bronchi in the lung parenchym with alveoli (2). The long arrows indicate the route of alveolar ducts (4 ↕ length, and cross 4↑). Pulmonary vessels (3).Lung parenchym; Pulmonary vesselsPoja Histology Collection - Respiratory System Subset
132 Survey of lung parenchym with bronchi and blood vessels (human, adult)Stain: Azan. The bronchus (1) is surrounded with hyaline cartilage rings (2), seromucous glands (9) and muscle fibers (*), and lined with respiratory epithelium (←). Pulmonary arteries (3) in their neighborhood; a solitary pulmonary vein (8); (4) Carbon deposits of varying sizes (dust loaded macr...BronchiolusPoja Histology Collection - Respiratory System Subset
133 Survey of nose wing - humanStain: Azan. At the top orofacial muscle (1, reddish) and hyaline cartilage (2, bluish) at the right. The external skin surface of the nose wing dot side (.) is covered with squamous epithelium, light-stained sebaceous glands (3) and hair structures (4). At the starred side (*) the nasal vestibulum...Poja Histology Collection - Respiratory System Subset
134 Survey of the nasal conchae (dog, isolated turbinate bones)Stain: Hematoxylin and eosin. The conchae (turbinates) consist of three parts: the inferior, middle and superior turbinate bones (3, black-stained); they are covered by a respiratory mucosa (1) or by an olfactory mucosa (2). In humans only a small part of the superior concha exhibits olfactory epith...Conchae nasales; Olfactory epithelium; Respiratory epitheliumPoja Histology Collection - Respiratory System Subset
135 The terminal part of the airway: alveoli (dog)Electron microscopy (low magnification). (A) indicate alveoli; (C) indicate capillaries. (1) type I alveolar cell (pneumocyte I, squamous alveolar cell); (2) type II alveolar cell (pneumocyte II, great alveolar cell). (3) alveolar macrophage. (4) endothelium of capillary.Pneumocyte I; Pneumocyte II; Alveolar macrophagePoja Histology Collection - Respiratory System Subset
136 Terminal sac period of developing lung (human, fetus)Stain: Hematoxylin and eosin. The transition of a terminal bronchiolus (1) into two future respiratory bronchioli (2), present as dilated spaces (saccules derived from the primitive respiratory channels, hence the name terminal sac period). The surrounding cellular tissue is composed of developing p...Lung development; Terminal sac period; Respiratory bronchioli; MesenchymePoja Histology Collection - Respiratory System Subset
137 Terminal sac period of developing lung (human, fetus, low magnification)Stain: Hematoxylin and eosin. At the right cross-sections of a large bronchus (1) with cartilage rings (2). Close to them a pulmonary artery (3), and a bronchiolus (4) without cartilage. (5) indicates a respiratory bronchiolus. Most alveoli are not inflated, the numerous dilated spaces (6) are saccu...Lung development ; Terminal sac period; Respiratory bronchioliPoja Histology Collection - Respiratory System Subset
138 ThrombogenesisMegakarocyte morphogenesis and platelet formation.ThrombogenesisHEAL Reviewed Collection
139 Trachea (cat)Stain: Orcein and eosin. At the top pseudostratified epithelium (1) followed by a thick layer filled with dark-stained elastic fibers (2). Bundle of smooth muscle fibers (3) (note: there is an artifactual space between the elastic layer and the smooth muscle), belonging to the tunica fibro-musculo-...Tracheal glands; Seromucous glandsPoja Histology Collection - Respiratory System Subset
140 Transition of respiratory bronchiolus into alveolar duct in the lung (human)Stain: Azan. The alveolar duct (1↔) exhibits an alveolated wall but at a few places (3) bronchiolar characteristics are evident such as cuboidal epithelium covering small areas of smooth muscle and connective tissue. They differ from the characteristic alveolar tips (2↓) of neighboring thin-wall...Alveolar ducts; Alveolar tipsPoja Histology Collection - Respiratory System Subset
141 Transition surface of vocal cord into laryngeal surface (human, subglottis, higher magnification)Stain:Stain: Azan. Transition (↓) from stratified squamous epithelium (1) into pseudostratified epithelium (2) in the subglottis region. Blood vessels and the cellularity of the proper lamina is evident.Olfactory epithelium; Subglottis; Stratified epithelium; Pseudostratified epitheliumPoja Histology Collection - Respiratory System Subset
142 Transition terminal bronchiolus - respiratory bronchiolus (human)Stain: Azan. A longitudinal section shows the transition from the lumen of a terminal bronchiolus (1) into that of a respiratory bronchiolus (2). The epithelium of the terminal bronchiolus is regularly columnar and ciliated. The respiratory bronchiolus has an irregular lining and is covered by low c...Terminal bronchiolus; Respiratory bronchiolus; Columnar epithelium; Cuboidal epithelium; Alveolar epitheliumPoja Histology Collection - Respiratory System Subset
143 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.DiapedesisPoja Histology Collection - Respiratory System Subset
144 Transitional zone in the middle part of nasal vestibulum (comparable with red zone or vermilion border of lip, human)Stain: Azan. At the right slightly cornified squamous epithelium (1) with small dermal papillae (2) and numerous blood vessels (3). To the left the transition to pseudostratified epithelium (4). In the submucosa branching seromucous nasal glands with draining ducts (5).Stratified epithelium; Pseudostratified epithelium; Nasal glands; Seromucous glandsPoja Histology Collection - Respiratory System Subset
145 Type I alveolar cell in the lung (human, adult)Electron microscopy. At the top the alveolar space is lined by type I alveolar cell (1, pneumocyte I). The cytoplasm is well provided with organelles and few electron-dense lysosomes, and pinocytotic vesicles. These pneumocyte I cells cover the interalveolar septa that contain fibroblasts and bundle...Pneumocyte I; InterstitiumPoja Histology Collection - Respiratory System Subset
146 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
147 Type II and type I alveolar cells in the lung (human, adult)Electron microscopy. At the top the alveolar space (1) is lined by a thin cytoplasm (2) of type I alveolar cell (pneumocyte I). At the left side part of a type II alveolar cell (3, pneumocyte II) with electron-dense remnants of two characteristic multilamellar bodies (4) as well as many organelles. ...Pneumocyte I; Pneumocyte II; Interstitial cell; Alveolar cell type I; Alveolar cell type IIPoja Histology Collection - Respiratory System Subset
148 Upper part of nasal septum (dog, higher magnification)Stain: Hematoxylin and eosin. Stratified squamous epithelium (1) with small papillae (2). The lamina propria contains many small and large thin-walled blood vessels also known as the venous plexus (sinusoids) of Auerbach (3, swell body). Nasal glands (4) with draining ducts (5, larger diameter) and ...Squamous stratified epithelium; Nasal vestibulum; Venous sinusoids; Venous plexus; Swell bodiesPoja Histology Collection - Respiratory System Subset
149 Ventricular fold (plica ventricularis) (human)Stain: Azan. On top pseudostratified epithelium (1). Lamina submucosa with predominantly mucous glands (3), fat cells (4) and blood vessels. The lamina propria also contains lymphoid follicles (2) with a germinal center (immune protection).Laryngeal glands; Ventricular fold; Seromucous glandsPoja Histology Collection - Respiratory System Subset
150 Ventricular fold (plica ventricularis) (human, higher magnification)Stain: Azan. On top pseudostratified columnar, ciliated epithelium (1). Centrally below an excretory duct (2) of laryngeal seromucous gland (3) with some adipocytes (*). Blood vessels and two lymph vessels (4) are present.Supraglottis; Ventricular fold; Laryngeal glands; Seromucous glandsPoja Histology Collection - Respiratory System Subset
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