Upload
phamtuong
View
230
Download
0
Embed Size (px)
Citation preview
EPITHELIAL TISSUE
Glandular epithelia
Objectives
• Identifying glandular epithelia on the
histologic slides
• Differential diagnosis of exocrine
glands
Glandular epithelia
• Epithelial cells specialized for synthesis
and secretion
• Secretory product is stored as secretory
granules
Classification of glandular epithelia
• According to the destination of secretory
product
1. Exocrine
2. Endocrine
3. Mixed
Glandular epithelia
1. EXOCRINE GLANDS
• According to cell number:
– Unicellular: goblet cell
– Multicellular
• Secretory portion/parenchyma
• Excretory duct
Classification of exocrine glandular epithelia
Classification of exocrine glandular epithelia - Simple Glands
Classification of exocrine glandular epithelia - Compound Glands
Goblet cells – unicellular exocrine gland
Small intestine, HE, ob. 40x Small intestine, PAS, ob.40x
Intraepithelial gland, HE, ob. 40x
Nasal mucosa
Longitudinal section, ob. 10x Cross section, ob. 20x
Simple columnar epithelium
Goblet cells
Simple tubular gland
Connective tissue
http://www.lab.anhb.uwa.edu.au/mb140/
Simple tubular glands, HE
Lieberkühn glands, large intestine
Sweat gland, skin
Simple coiled tubular gland, HE, ob. 20x
http://www.lab.anhb.uwa.edu.au/
Secretory unit
Excretory duct
Stomach –gastric glands
Simple branched tubular glands, col. HE, ob. 4x, 10x
Sebaceous gland, skin
Simple acinar branched, HE, ob.10x
Epidermis
Dermis
15 Simple acinar branched, HE, ob.10x
Sebaceous gland, skin
Compound tubular, HE
Brunner glands, duodenum
Compound tubulo-acinar, HE
Parotid Gland
Serous acini, HE, ob.40x
Parotid Gland
Mucous acini, HE, ob. 40x
Sublingual Gland
Serous acini vs. Mucous acini
Mixed acini, HE, ob.40x
Sublmandibular Gland
Glandular epithelia
2. ENDOCRINE GLANDS
Nests of endocrine epithelium, HE, ob. 20x
Adenohypophysis C- capilary, -nests
Strands/cords of endocrine epithelia, HE, ob. 40x
Adrenal gland
Ross HM, Histology: A Text and Atlas, 4th ed.
arrows – capilaries
Follicles, HE, ob.60x
Thyroid
Glandular epithelia
3. MIXED GLANDS
Compound acinar, HE
Exocrine pancreas
Islet of Langerhans, HE
Endocrine pancreas