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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| Title | Description | Subject | Collection | ||
|---|---|---|---|---|---|
| 101 |
 |
Respiratory epithelium of trachea (human, adult, high magnification) | Stain: Azan. The red-stained pseudostratified epithelium contains cilia and light goblet cells (white droplets) and a distinct basement membrane that continues in the intense blue-stained lamina propria and the submucosa consisting of fibrous tissue of elastic and collagenous fibers. | Tracheal glands; Excretory duct; Perichondrium | Poja Histology Collection - Respiratory System Subset |
| 102 |
 |
Respiratory region of nasal vestibulum (human, higher magnification) | Stain: Azan. At the top pseudostratified, ciliated epithelium (1) with a distinct endoepithelial gland (2, pink-stained mucous cells). The proper lamina is cell-rich and draining ducts (3, enclosed by thicker blue-stained borders) and acini of the nasal glands (5) are present here as well as in the ... | Pseudostratified epithelium; Nasal glands; Seromucous glands; Endoepithelial glands | Poja Histology Collection - Respiratory System Subset |
| 103 |
 |
Scheme of peripheral lung parenchym (human, adult) | (1) respiratory bronchiolus; (2) alveolar duct; (3) alveolar sac is a virtual sac formed by several alveoli, but continuous with the alveolar duct; (4) alveoli which end in small tips (↓) with elastin interwoven with collagen. | Alveolar duct | Poja Histology Collection - Respiratory System Subset |
| 104 |
 |
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 |
| 105 |
 |
Scheme of trachea | C. Trachea (human, adult) magnification x 7.5 objective). D. Trachea (human, adult, detail of rectangle in C) magnification x 85 objective. (12) pseudostratified ciliated epithelium; (13) seromucous tracheal glands; (14) condensed layer of elastic fibers at the border of lamina propria and submu... | Pseudostratified epithelium ; Fibroelastic membrane; Adventitia | Poja Histology Collection - Respiratory System Subset |
| 106 |
 |
Scheme of trachea (human, adult) | On top pseudostratified ciliated epithelium (1) with goblet cells followed by a condensed layer of elastic fibres (2) and the transition (*) to seromucous tracheal glands (3) close to the edge of the perichondrium (4) of hyaline cartilage (5). | Pseudostratified epithelium ; Perichondrium | Poja Histology Collection - Respiratory System Subset |
| 107 |
 |
Scheme survey frontal section of larynx (human) | Stain: Azan. A pseudostratified epithelium covers the mucosa of the laryngeal cavity and vestibulum. At the vocal fold edge (3) the epithelium appears to be nonkeratinizing squamous. The connective tissue is rigidly attached to this edge and merges into the vocal ligament (dense elastic) and vocal m... | Vocal ligament; Laryngeal glands; Ventricular fold | Poja Histology Collection - Respiratory System Subset |
| 108 |
 |
Section of trachea (human, adult, high magnification) | Stain: Azan. On top: the epithelium (1) is pseudostratified with cilia and goblet cells (white droplets) on a distinct basement membrane (↓, undulating thick deep-red line) followed by a small proper lamina (2). The submucosa (3) starts where the fibrous tissue (elastic fibers reinforced with coll... | Pseudostratified epithelium ; Tracheal glands; Excretory duct; Perichondrium | Poja Histology Collection - Respiratory System Subset |
| 109 |
 |
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 epithelium | Poja Histology Collection - Respiratory System Subset |
| 110 |
 |
Small bronchus in the lung (human, adult) | Stain: Azan. Pseudostratified epithelium (1) with in between light-stained goblet cells and a blue stained basement membrane (↓) with the proper lamina. The thin smooth muscle layer (2) is purple stained and accompanies the mucosal layer. At (3) a small hyaline cartilage and seromucous bronchial g... | Small bronchus; Pseudostratified epithelium; Seromucous glands | Poja Histology Collection - Respiratory System Subset |
| 111 |
 |
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 glands | Poja Histology Collection - Respiratory System Subset |
| 112 |
 |
Submucosa of trachea (human, adult) | Stain: Goldner trichrome. Mixed tracheal glands (1) of the submucosa (connective tissue light green) and bundles of smooth muscle fibers (2) close to the fibroelastic membrane between the cartilage edges. | Seromucous gland; Tracheal glands | Poja Histology Collection - Respiratory System Subset |
| 113 |
 |
Surface of lung pleura (gerbil) | Scanning electron microscopy of visceral pleura. Alveoli (A) and capillaries (c) with scattered erythrocytes (artifactual due to preparation procedures). At (*) connective tissue and in between erythrocytes. The visceral surface is covered by a continuous sheet of flat squamous mesothelial cells (1,... | Visceral pleura; Mesothelium | Poja Histology Collection - Respiratory System Subset |
| 114 |
 |
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 |
| 115 |
 |
Surface of olfactory epithelium in the nose (rat) | Scanning electron microscopy. A carpet of fine long threads of olfactory cilia (*). On top of the carpet broken remnants of cilia clotted due to secretion products. | Olfactory epithelium | Poja Histology Collection - Respiratory System Subset |
| 116 |
 |
Surface of the nasal septum (rat) | Scanning electron microscopy of anterior part of the nasal septum. The superficial squamous cells of the stratified epithelium are large cells provided with small stubby microvilli. Cell borders are well indicated (↓). | Nasal vestibulum; Stratified epithelium | Poja Histology Collection - Respiratory System Subset |
| 117 |
 |
Surface of trachea epithelium (rat) | Scanning electronmicroscopy. There is an abundancy of cilia with interspersed protrusions (↓) of goblet cells due to apical secretion. | Pseudostratified epithelium | Poja Histology Collection - Respiratory System Subset |
| 118 |
 |
Survey frontal section of larynx (human) | Stain: Azan. A pseudostratified epithelium covers the mucosa of the laryngeal cavity and vestibulum. At the vocal fold edge (3) the epithelium appears to be nonkeratinizing squamous. The connective tissue is rigidly attached to the this edge and merges into the vocal ligament (dense elastic) and voc... | Vocal muscle; Vocal ligament; Laryngeal glands; Ventricular fold | Poja Histology Collection - Respiratory System Subset |
| 119 |
 |
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 bodies | Poja Histology Collection - Respiratory System Subset |
| 120 |
 |
Survey of a centrilobular lung emphysema: section of an lobule (human, adult) | Stain: Hematoxylin and eosin. The enlargement of large areas of the air spaces (X) is evident due to destruction of the walls of alveoli throughout the lobule. | Poja Histology Collection - Respiratory System Subset | |
| 121 |
 |
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 parenchym | Poja Histology Collection - Respiratory System Subset |
| 122 |
 |
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 parenchym | Poja Histology Collection - Respiratory System Subset |
| 123 |
 |
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 cartilages | Poja Histology Collection - Respiratory System Subset |
| 124 |
 |
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 cavity | Poja Histology Collection - Respiratory System Subset |
| 125 |
 |
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 glands | Poja Histology Collection - Respiratory System Subset |