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44885

Comparative morphology of the iris of donkey (Equus asinus) and buffalo (Bos bubalis)

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Last updated: 22 Jan 2023

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Abstract

This work was carried out on 22 eyeballs collected from two animal species namely donkey and buffalo (11 from each) to elucidate gross anatomical, light and scanning electron microscopical features of the iris in addition to some morphomet- rical characteristics. The iris constitutes a variable relative surface area (in relation to uvea) being the highest in the donkey. Breadth of the iris varies topographically. In buffaloes, the dorsal and ventral parts are wider than the medial and lateral ones with a subsequently oval pupil. In donkeys the breadth of the iris is nearly uniform encircling a semicircular pupil. The dorsal side of the pupillary border of the iris carries several variably- sized black masses (Corpora nigra). Anterior and posterior surfaces of the iris are studded by circular and longitudinal folds indicating the arrangement of constrictor and dilator pupillary muscles, respectively. The constrictor muscle occupies variable breadth of the iris indicating its myotic strength, while the thickness of the dilator indicates its medriatic efficiency.

DOI

10.21608/jva.2012.44885

Keywords

Morphology, Iris, donkey, Buffalo

Authors

First Name

Ahmed

Last Name

Zayed

MiddleName

El-Zuhry

Affiliation

Department of Anatomy & Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.

Email

elzuhry@yahoo.com

City

Assiut

Orcid

-

First Name

Khaled

Last Name

Aly

MiddleName

-

Affiliation

Department of Anatomy & Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.

Email

-

City

-

Orcid

-

First Name

Ismail

Last Name

Ibrahim

MiddleName

Abdel-Aziz

Affiliation

Department of Anatomy & Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.

Email

-

City

-

Orcid

-

First Name

Ahmed

Last Name

Kotb

MiddleName

Mohammed

Affiliation

Department of Anatomy & Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.

Email

-

City

-

Orcid

-

Volume

5

Article Issue

1

Related Issue

6829

Issue Date

2012-04-01

Receive Date

2011-10-16

Publish Date

2012-04-01

Page Start

75

Page End

90

Print ISSN

1687-9988

Online ISSN

2357-0504

Article File

JVA_Volume 5_Issue 1_Pages 75-90.pdf

PDF . 1.4MB

Link

https://jva.journals.ekb.eg/article_44885.html

Detail API

https://jva.journals.ekb.eg/service?article_code=44885

Order

5

Type

Original Article

Type Code

782

Publication Type

Journal

Publication Title

Journal of Veterinary Anatomy

Publication Link

https://jva.journals.ekb.eg/

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Article

Created At

22 Jan 2023