Bronchus (histology)

Sample 1
https://www.wikiskripta.eu/images/c/c6/Bronchus4.jpg

Name: Bronchus - low magnification (HE)

Description: The bronchus is lined by a multi-rowed columnar epithelium with cilia. Underneath it is a thin collagenous lamina propria mucosae. In the wall we see hyaline cartilage (tunica fibro-musculo-cartilaginea) and sero-mucinous glands.

1 - lamina epithelialis 2 - sero-mucinous glands 3 - cartilage 4 - fatty tissue

Sample 2
https://www.wikiskripta.eu/images/4/4c/Bronchus2.jpg

Name: Multi-rowed cylindrical epithelium with cilia (Bronchus); (HE)

Description: In stratified epithelium, all cells reach the basal lamina, but their nuclei are located at different heights. It appears as if the cells form layers. Epithelium contains ciliated cells, basal cells, goblet cells, and brush border cells. The mucin in the goblet cell is stained blue. Note: Mucin is usually washed out during fixation, which is why vacuoles are usually seen as white (bright spots). With this preparation, it was possible to fix the mucin (make it insoluble). As an acidic structure (glycoprotein), it stains basophilic.''

1 - the entire thickness of the epithelium 2 - goblet cells 3 - lamina propria 4 - tunica fibro-musculo-cartilaginea (here denser connective tissue and smooth muscle cells)

Sample 3
https://www.wikiskripta.eu/images/f/f2/Bronchus_6.jpg

Name: Intrapulmonary bronchus (staining - Alcian blue, hematoxylin)

Description: The hyaline cartilage in the bronchus is colored blue. A lymph node (follicle) can be seen in the wall above. The bronchus is surrounded by lung tissue (single-layered squamous epithelium).

1 - cartilage, 2 - pulmonary alveoli, 3 - respiratory epithelium (multi-row cylindrical epithelium with cilia) 4 - tunica fibro-musculo-cartilaginea (sometimes also referred to not quite appropriately as submucosa)

Sample 4
https://www.wikiskripta.eu/images/b/b4/Bronchus_3lf.jpg

Name: Bronchus - multi-row cylindrical epithelium with cilia; HE

Description: Multiple columnar epithelium with cilia: The stronger staining line represents the basal bodies of the cilia. Nuclei are stored in multiple rows, all cells are attached to the basal lamina.

Sample 5
https://www.wikiskripta.eu/images/thumb/e/ed/06_Bronchus.jpg/800px-06_Bronchus.jpg

Title: Bronchus; HE

Description: The wall of the bronchus consists of mucosa' (multiple columnar epithelium with cilia and lamina propria mucosae - sparse collagenous tissue), tunica fibro-musculo-cartilaginea', which it contains collagen fibers with an admixture of elastic fibers, smooth muscle and hyaline cartilage. Externally, the tunica adventicia is found. In the wall of the bronchus, there are mixed seromucinous glands in the ligament. The specimen shows relatively wide ducts of these glands.

Sample 6
https://www.wikiskripta.eu/images/0/01/Hyalinn%C3%AD_chrupavka_3lf.jpg

Name: Bronchus - hyaline cartilage

Description: Chondrocytes are stored in lacunae, which are surrounded by intercellular matrix. On the surface of the cartilage we see the perichondrium (collagenous ligament). The cells of the perichondrium differentiate into chondrocytes and gradually become rounded.

Sample 7
https://www.wikiskripta.eu/images/0/06/Hyalinn%C3%AD_chrupavka_8.jpg

Name: Hyaline cartilage - bronchus; coloring – alcian blue

Description: Chondrocytes lie in lacunae. Several chondrocytes lying in close proximity form an 'isogenetic group.

Epithelia
Muscular artery (preparation)

Kidney (preparation)

Thyroid gland (preparation)

Colon (preparation)

Oviduct (preparation)

Bronchus (preparation)

Urinary bladder (preparation)

Abdominal skin (preparation)

Esophagus (preparation)

Vagina (preparation)

Lungs (preparation)

Small intestine (preparation)

Pancreas (preparation)

Parotis (preparation)

Submandibularis (preparation)

Mamma lactans (preparation)

Mamma nonlactans (preparation)

Stomach fundus (preparation)

Adrenal gland (preparation)

Links

 * Cellular foundations of medicine module (3rd Faculty of Medicine UK)

Study materials for the preparation

 * https://en.wikipedia.org/wiki/Bronchus