Embryology
Ahmad reza raji; shadi Hashemnia; Ahmad ail Mohammadpour; Abolghasem Nabipour; zohre saddatfar
Articles in Press, Accepted Manuscript, Available Online from 05 May 2024
Abstract
Ostrich (Struthio camelus) is an important wild species highlighted in national and international livestock. This research was conducted to analyze the development of the ostrich respiratory system in fetal and embryonic stages. A total of 50 fertile ostrich eggs were collected from commercial farms. ...
Read More
Ostrich (Struthio camelus) is an important wild species highlighted in national and international livestock. This research was conducted to analyze the development of the ostrich respiratory system in fetal and embryonic stages. A total of 50 fertile ostrich eggs were collected from commercial farms. They were incubated at 36–37°C and 25 ± 2% humidity for 40 days. Sections were taken in 13, 22, 26, 30, 36, and 42 days of incubation from the lung and the cranial, middle, and caudal parts of the neck after decapitation of ostrich embryos and blood drainage. After fixation, processing, blocking, and sectioning, all samples were stained by hematoxylin and eosin, Alcian blue (AB), Van Gieson, and Periodic acid-Schiff (PAS) techniques.It was concluded that the trachea in the 13-day-old embryo (E13) and goblet cells (PAS-positive and AB-positive) had incomplete rings of hyaline cartilages and differentiation of mesenchymal to the loose connective tissue.Bronchial stage of the lung in the E22, pseudo-glandular stage in the E26, and parabrachial and air capillary stage in the E30 were also observed. The information obtained here will be useful for diagnosing the pathologies affecting this vital system and results in improving industrial breeding management.
Mohammad Ali Ebrahimi Saadatlou; Rasoul Shahrouz
Volume 7, Issue 3 , September 2016, , Pages 221-226
Abstract
In the present study, the lenses and ciliary bodies of 20 ostrich eyes were studied macroscopically and microscopically. The histological slides were studied after staining by hematoxylin and eosin, Verhoeff, Van Gieson, and periodic acid-Schiff (PAS). Posterior surface of lens was more convex than its ...
Read More
In the present study, the lenses and ciliary bodies of 20 ostrich eyes were studied macroscopically and microscopically. The histological slides were studied after staining by hematoxylin and eosin, Verhoeff, Van Gieson, and periodic acid-Schiff (PAS). Posterior surface of lens was more convex than its anterior surface. The average lens diameter and thickness were respectively measured as 1.43 ± 0.00 and 0.85 ± 0.00 cm. The average ciliary body thickness was measured as 1.48 ± 0.01 cm. In addition, the ciliary body was seen annular with mean horizontal and vertical external diameters as 4.80 ± 0.07 and 4.36 ± 0.06 cm, respectively. The retina is extended on ciliary body in this bird. The number of ciliary body processes was about 120. The epithelium of lens was cuboidal and the lens capsule had intense positive PAS reaction. Also, the anterior surface of capsule was thicker than its posterior surface. The lens fibers in the central part were thicker than other parts. Elastic and collagen fibers were not observed in the lens. The epithelium of ciliary processes had two layers; superficial cuboidal non-pigmented layer, and deep heavily pigmented layer. The ciliary body was supported by a hyaline cartilage. In addition to the smooth muscle fibers, many isolated skeletal muscle fibers were also seen in ciliary body. In conclusion, the lens and ciliary body of ostrich were similar to other birds, although there were little differences in anatomical dimensions and histological characteristics.
Mina Tadjalli; Saeed Nazifi; Behrokh Marzban Abbasabadi; Banafsheh Majidi
Volume 4, Issue 3 , September 2013, , Pages 199-203
Abstract
In order to perform a histomorphometric study of blood cells in male adult ostrich, blood samples were obtained from jugular vein of 10 clinically healthy male adult ostriches (2 - 3 years old). The slides were stained with the Giemsa methods and the smears were evaluated for cellular morphology, with ...
Read More
In order to perform a histomorphometric study of blood cells in male adult ostrich, blood samples were obtained from jugular vein of 10 clinically healthy male adult ostriches (2 - 3 years old). The slides were stained with the Giemsa methods and the smears were evaluated for cellular morphology, with cellular size being determined by micrometry. The findings of this study revealed that the shape of the cell, cytoplasm and nucleus of erythrocytes in male adult ostriches were similar to those in other birds such as quails, chickens, Iranian green-head ducks.
