Attia, H., Alkafafy, M., Rashed, R. (2010). Prenatal Development of the Pars Intermedia of the Pituitary Gland in the Water Buffalo (Bubalus bubalis).. test, 3(1), 43-54. doi: 10.21608/jva.2010.44905
Hossam Attia; Mohamed Alkafafy; Reda Rashed. "Prenatal Development of the Pars Intermedia of the Pituitary Gland in the Water Buffalo (Bubalus bubalis).". test, 3, 1, 2010, 43-54. doi: 10.21608/jva.2010.44905
Attia, H., Alkafafy, M., Rashed, R. (2010). 'Prenatal Development of the Pars Intermedia of the Pituitary Gland in the Water Buffalo (Bubalus bubalis).', test, 3(1), pp. 43-54. doi: 10.21608/jva.2010.44905
Attia, H., Alkafafy, M., Rashed, R. Prenatal Development of the Pars Intermedia of the Pituitary Gland in the Water Buffalo (Bubalus bubalis).. test, 2010; 3(1): 43-54. doi: 10.21608/jva.2010.44905

Prenatal Development of the Pars Intermedia of the Pituitary Gland in the Water Buffalo (Bubalus bubalis).

Journal of Veterinary Anatomy
Article 4, Volume 3, Issue 1, April 2010, Pages 43-54    PDF (729.76 K)
Document Type: Original Article
DOI: 10.21608/jva.2010.44905
Authors
Hossam Attia1; Mohamed Alkafafy2; Reda Rashed3
1Department of Histology and Cytology, Faculty of Veterinary Medicine, Benha University, Egypt
2Department of Cytology and Histology, Faculty of Veterinary Medicine, Minuofiya University, Sadat City Branch, Egypt
3Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Minuofiya University, Sadat City Branch, Egypt
Abstract
This study was carried out on pituitary glands collected from buffalo embryos and fetuses with a crown vertebral rump length (CVRL) ranging from l.5 to 95 cm. The specimens were immediately immer-sed in the fixatives at least 3 days and paraffin embedded for routine histological work. The primordia of the pars intermedia (PI) appeared at 1.5 cm CVRL as group of undifferentiated mesenchymal cellular band. This band was completely enclosing the pars nervosa (PN) at 3.2 cm CVRL. It appeared thick ventrally around the bottom of the PN. It was separated from the pars distalis (PD) via the hypophyseal cleft and from the neural lobe via thick reticular connective tissue fibers. These cells were differentiated to chromophils and chromophobes at 24 cm CVRL. The chromophils were exclusively basophils. Melanotrophs (MSH-cells) began to appear as polyhedral cells; seen scattered among the follicular cells at 35 cm CVRL. Adrenocorticotrophs (ACTH-cells) first appeared at 75 cm CVRL. The numbers of MSH- and ACTH-cells increased toward the full term age. In conclusion, this numerical increase might prepare the foetal adrenals to face the stresses during and after parturition; and the foetal skin to protect itself (by melanin) from the solar insults.
Keywords
Pituitary gland; Water buffalo; Pars intermedia; Prenatal development
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