Histoanatomical study of larynx of Camelus dromedarius

Subject Areas : Veterinary Clinical Pathology

M.A Ebrahimi ¹ (Department of Basic Science, Faculty of Veterinary Medicine, Islamic Azad University-Tabriz Branch, Tabriz, Iran)
علی Asgari nami ² (Graduate of Veterinary Medicine, Faculty of Veterinary Medicine, Islamic Azad University-Tabriz Branch, Tabriz, Iran)
رعنا Keyhanmanesh ³ (Department of Physiology, Tabriz University of Medical Science, Tabriz, Iran)

Received: 2009-01-18 Accepted : 2010-10-02 Published : 2010-05-22

Keywords: camel, histoanatomy, Larynx,

Abstract :

In this study, 10 samples of the larynx of Camelus dromedarius were evaluated anatomically and histologically. The usual anatomical and histological (H&E and Verhoeff staining methods) were used. For detecting the internal form of larynx, plaster casts were prepared. This study demonstrated that the mean length and width of epiglottis and thyroid cartilages were 8.21 ± 0.28, 4.59 ± 0.34 cm, 6.53 ± 0.28 and ­6.99 ± 0.15­cm, respectively. The average length of dorsal and ventral part of cricoid cartilage was 6.06 ± 0.17 and 4.58 ± 0.25 cm. The mean length of T head and T handle in arytenoid cartilage was 3.58 ± 0.11 and 3.35 ± 0.05 cm, respectively. In addition, the average length and width of corniculate cartilage was 3.52­ ±­0.03 and 1.73 ± 0.04 cm. In this animal, the epiglottis cartilage was long and pointed. Laryngeal prominence in thyroid cartilage was absent. The cuneiform cartilage is very thin and located in the base and sides of epiglottis. Contrary to other animals, the cricoid cartilage of this animal in both dorsal and ventral parts was very thick. Moreover, the vocal and vestibular folds with lateral laryngeal ventricle were present. The histological study showed that epiglottis, corniculate, apex of cuneiform and arytenoid cartilages are made of elastic cartilage and the other cartilages such as thyroid, cricoid and the base of cuneiform cartilages are made of hyaline cartilage. The epithelial tissue of all parts of larynx was stratified squamous nonkeratinized except the cricoid cartilage which had ciliated pseudostratified columnar epithelium.

References:

1. پوستی ، ا. 1385. بافت­شناسی مقایسه‌ای. دانشگاه تهران، ‌صفحات: 320-319.


2. رضاییان، م. 1385. بافت­شناسی و اطلس رنگی دامپزشکی. انتشارات دانشگاه تهران، صفحات: 257-256.


3. مقدس، الف. 1376. شتر و پرورش آن. انتشارات نوربخش تهران، صفحات: 40- 28.


4. موسویان، س.م. 1384. بررسی هیستوآناتومی حنجره گاومیش رودخانه­ای. پایان نامه جهت دریافت دکترای حرفه­ای دامپزشکی، دانشکده دامپزشکی دانشگاه آزاد اسلامی واحد تبریز.


5. ناظر عدل، ک. 1365. پرورش شتر. انتشارات جهاد دانشگاهی دانشگاه تبریز، صفحات: 65-35.

1. Banks, W.J. 1993. Apply Veterinary Histology. Third edition. Mosby, London, p: 205.

7. Calhoun, M.L. and Kartawiria, K. 1985. The gross and microscopic anatomy of the postnatal epiglottis of seven domestic animals. Anat. Rec. 14(3):151.


8. Cook, W.R. 1980. Clinical observations on the anatomy and physiology of the equine upper respiratory tract. Vet. Rec. 17(2):79.


9. Dellman, H.D. and Eurell, J. 1998. Text Book of Veterinary Histology. Williams and wilkins, London, Fifth Edition. p: 153-154.


10. Dyce, K.M., Sack, W.O. and Wensing, C.J.G. 2002. Text book of Veterinary Anatomy, Saunders, London. p: 152-156, 380-382, 501-503, 640, 768 & 812.


11. Eurell, J.A. and Frappier, B.L. 2006. Dellmans Text Book of Veterinary Histology. Blackwell, U.S.A., p: 159-160.


12. Fawcett, D.W. and Bloom, B.M. 1986. Text Book of Veterinary Histology. Saunders, London, Eleventh Edition. p: 189-195.


13. Frandson, R.O. 1980. Anatomy and Physiology of Farm Animal. Lippincott, London, p: 294-296.


14. Getty, R. 1975. Sisson and Grossmans, The anatomy of the domestic animals. Saunders, London, Fifth Edition. p: 119-120, 457, 504-511, 919-926, 1285-1290, 1562-1567, 1891-1897.


15. Gross, E.A. and Morgan, K.T. 1991. Architecture of nasal passages and larynx. CRC Press, London, p:


16. Junqueria, L.C., Carneiro, J. and Kelley, R.O. 2005. Basic Histology.  Ling, New York, p: 329-333.


17. Nickel, R., Schummer, A. and Seferle, E. 1979. The Viscera of the Domestic Mammals, Verlag Paul Pary, Berlin, p: 225-238.


18. Quinlan, T., Goulden, B.E. and Davies, A.S.  1979. Bilateral asymmetry of equine laryngeal muscles. N. Z. Vet. J. 17(3):23.


19. Sagara, M. 1981. A comparative anatomical study of the laryngeal muscles in mammals. Igaku Kenkyu. 28: 3333-3355.


20. Samuelson, D.A. 2007. Textbook of Veterinary Histology. Saunders, Elsevier, p: 225, 230, 246.


21. Yagil, R. 1985. The desert camel. Krager, New York, p: 67-69.