Lecture 12: Exocrine And Special Glands Flashcards
What are the differences between exocrine and endocrine glands?
- Presence of ducts: ducted (exocrine) and ductless (endocrine)
- Mode of secretion: via duct (exocrine) and directly into blood (endocrine)
What are simple and compound glands?
- Simple: single unbranded duct
- Compound: ducts branch repeatedly
What are acinar and tubular glands?
- Acinar: sac like
- Tubular: tube like
What are serous and mucous glands?
- Mucous: sticky fluid
- Serous: lubricating fluid
What are unicellular glands / goblet cells?
- Isolated secretory cells that secretes mucus
Where are goblet cells found?
- Intestinal epithelium
- Jejunum
- Large intestine
- Respiratory tract
What are the functions of the goblet cell?
- Secrete mucus for protection
- Support respiratory escalator in removal of foreign particles as mucus acts as lubricant
What are parotid glands?
- Serous exocrine glands
- Pair of salivary glands
What are the functions of the parotid glands?
Secrete saliva that contains enzymes
Where are parotid glands found?
situated below and in front of each ear
What are the histological features of parotid glands?
- Striated duct
- Numerous serous acini
- Basally positioned nuclei
- Stores secretory proenzyme as zymogen granules
What are submandibular glands?
- one of the major salivary glands
- compound, tubuloacinar gland, with serous, mucous and mixed acini
What are the functions of the submandibular gland?
Secretes saliva into floor of the mouth
Where is the submandibular gland located?
Below the mandible of either side of the neck
What are the histological features of the submandibular glands?
- Presence of mucous (pale staining), serous cells (purple staining)
