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Anatomy of parotid gland and its secretory ducts in sheep
- Department of Medical Laboratory Services, Vocational School of Health Services, Malatya Turgut Özal University, Malatya, Türkiye
- Department of Anatomy, Faculty of Medicine, Kırşehir Ahi Evran University, Kırşehir, Türkiye
open access
Abstract
Background: The parotid gland in sheep ends freely in front of the masseter muscle, and paracondylary section of occipital bone and extends deep until pterygoid extends of sphenoid bone and hyoid bone. The structure of salivary
glands in mammals has been thoroughly studied using histological and sialographic method. This study aimed to reveal the detailed anatomic features and race-specific differences of the canal system of the parotid glands in Akkaraman sheep by using the corrosion cast technique.
Materials and methods: Thirteen sheep parotid glands from 7 Akkaraman sheep were used in this study. Parotid glands were removed from their places with ducts. Measurements were made with a calliper from back to front, top to bottom and inside to outside. After dissection of the parotid glands, their volumes were measured according to the ‘Archimedes principle’. Also, 13 sheep parotid glands were examined using the polyester resin method.
Results: In the present study, our average metric results were: length of parotid duct was 10.92 ± 1.027 cm, length of parotid gland was 5.87 ± 1.04 cm, volume of parotid gland was 12.50 ± 2.48 cm3, thickness of parotid gland was 0.75 ± 0.36 cm and width of parotid gland was 4.07 ± 0.43 cm. The average weight of the parotid gland of Akkaraman sheep was identified as 25.3 g. Accessory parotid gland was not encountered in the current study.
Conclusions: It was observed that polyester entered into the parotid duct and filled up until the acinus and made both acinus and secretory ducts well-examined in this study. It was also observed that the parotid gland consisted of lobes and lobules. The average number of lobes was 12. The number of lobules in a lobe varied between 3 and 16, each lobe consisted of an average of 9 lobules. It was found that each lobe has its own lobar duct.
Abstract
Background: The parotid gland in sheep ends freely in front of the masseter muscle, and paracondylary section of occipital bone and extends deep until pterygoid extends of sphenoid bone and hyoid bone. The structure of salivary
glands in mammals has been thoroughly studied using histological and sialographic method. This study aimed to reveal the detailed anatomic features and race-specific differences of the canal system of the parotid glands in Akkaraman sheep by using the corrosion cast technique.
Materials and methods: Thirteen sheep parotid glands from 7 Akkaraman sheep were used in this study. Parotid glands were removed from their places with ducts. Measurements were made with a calliper from back to front, top to bottom and inside to outside. After dissection of the parotid glands, their volumes were measured according to the ‘Archimedes principle’. Also, 13 sheep parotid glands were examined using the polyester resin method.
Results: In the present study, our average metric results were: length of parotid duct was 10.92 ± 1.027 cm, length of parotid gland was 5.87 ± 1.04 cm, volume of parotid gland was 12.50 ± 2.48 cm3, thickness of parotid gland was 0.75 ± 0.36 cm and width of parotid gland was 4.07 ± 0.43 cm. The average weight of the parotid gland of Akkaraman sheep was identified as 25.3 g. Accessory parotid gland was not encountered in the current study.
Conclusions: It was observed that polyester entered into the parotid duct and filled up until the acinus and made both acinus and secretory ducts well-examined in this study. It was also observed that the parotid gland consisted of lobes and lobules. The average number of lobes was 12. The number of lobules in a lobe varied between 3 and 16, each lobe consisted of an average of 9 lobules. It was found that each lobe has its own lobar duct.
Keywords
parotid gland, corrosion, secretory duct
Title
Anatomy of parotid gland and its secretory ducts in sheep
Journal
Issue
Article type
Original article
Pages
679-684
Published online
2021-07-21
Page views
4824
Article views/downloads
2049
DOI
Pubmed
Bibliographic record
Folia Morphol 2022;81(3):679-684.
Keywords
parotid gland
corrosion
secretory duct
Authors
G. B. Uzun
B. Kamaşak
T. Ulcay
K. Aycan
- Aktan ZA, Bilge O, Pinar YA, et al. Duplication of the parotid duct: a previously unreported anomaly. Surg Radiol Anat. 2001; 23(5): 353–354.
- Amano O, Mizobe K, Bando Y, et al. Anatomy and histology of rodent and human major salivary glands. Acta Histochem Cytochem. 2012; 45(5): 241–250.
- Aycan K, Bilge A. Plastik enjeksiyon ve korozyon metodu ile vasküler sistem anatomisinin araştırılması. Erciyes Üniv Tıp Fak Dergisi. 1984; 6: 545–552.
- Aycan K, Ulcay T, Kamaşak B. The morphology of the afferent and efferent domain of the sheep glomerulus. Folia Morphol. 2021; 80(4): 881–887.
- Bahadir O, Bektas D, Caylan R, et al. Sialolithiasis of an accessory parotid gland. Ann Otol Rhinol Laryngol. 2004; 113(1): 52–54.
- Banks JW. Applied Veterinary Histology. 2nd ed. Williams and Wilkins, Baltimore 1986: 417–418.
- Dehghani SN, Tadjalli M, Masoumzadeh MH. Sialography of sheep parotid and mandibular salivary glands. Res Vet Sci. 2000; 68(1): 3–7.
- Dellmann HD, Brown EM. Textbook of veterinary histology. 2nd ed. Lea Febiger, Philadelphia 1981.
- Dursun N. Veteriner Anatomi. Medisan Yayınevi, Ankara 2006: 31–35.
- Elewa YH, Bareedy MH, Abuel-Atta AA, et al. Structural characteristics of goat (Capra hircus) parotid salivary glands. Jpn J Vet Res. 2010; 58(2): 121–135.
- Estecondo S, Codón S, Casanave E. Histological study of the salivary glands in Zaedyus pichiy (Mammalia, Xenarthra, Dasypodidae). Int J Morphol. 2005; 23(1).
- Fernandes A, Lima R, Rossi M, et al. Parotid Gland with Double Duct: An Anatomic Variation Description. Int J Morphol. 2009; 27(1).
- Gartner PL. Essentials of Oral Histology and Embryology. 3nd ed. Jen House, publishing company, Baltimore 1999: 127–135.
- Getty R. Sisson and Grossman’s the anatomy of domestic animals. 5th ed. WB Saunders Co, Philadelphia 1975: 872–874.
- Hamdy MR, Nora AS. Parotid and mandibular salivary glands segmentation of the one humped dromedary camel (Camelus dromedarius). Int J Adv Res Biol Sci. 2017; 4(11): 31–41.
- Kimura J, Habata I, Endo H, et al. Histochemistry of complex carbohydrate in the major salivary glands of hoary bamboo rats (Rhizomys purinosus). Anat Histol Embryol. 1998; 27(3): 147–153.
- Mahdi S, Khojasteh B, Delashoub M. Microscopic anatomy of the parotid and submandibular salivary glands in European hamster (Cricetus cricetus L. Int Res J App Basic Sci. 2012; 3(7): 1544–1548.
- Miyazaki T, Tatsukawa S, Kitamura H, et al. Morphological and functional changes of the rat parotid glandular cells by clipping and reopening the parotid duct, using HAM8 antibody. Anat Sci Int. 2008; 83(2): 89–95.
- Paula F, Teshima TH, Hsieh R, et al. Overview of Human Salivary Glands: Highlights of Morphology and Developing Processes. Anat Rec (Hoboken). 2017; 300(7): 1180–1188.
- Simawy MSH, Mahdi AA. Radiological comparative study of the mandibular salivary gland between adult male gazelle (subguttturosa) and sheep (awassi). Bas J Vet Res. 2019; 18(1): 122–133.
- Singh AD, Jain RK, Pawan K. Topographic anatomy of buccal and labial glands in sheep. Haryana Vet. 2011; 50: 30–32.
- Singh AD, Sasan S, ohn MA, et al. Gross and microscopic characterization of the parotid salivary gland of sheep. Indian Vet J. 2015; 92(1): 61–63.
- Stevens A, Lowe SJ. Human Histology. 2nd ed. Mosby, Nottingham 1997: 188–189.
- Tadjalli M, Dehghani SN, Basiri M. Sialography in dog: normal appearance. Veterinarski Arhiv. 2004; 74(3): 225–233.
- Williams PL, Warwick R, Dyson M, Bannister LH. Gray’s anatomy. 38th ed. Churchill Lvingtone, New York 1995: 1690–1691.