Guinea chicken (Numida meleagris) Pecten Oculi were examined for gross, histological, histochemical, and ultrastructural studies on their 18 eyes. There are 13 to 17 accordion (pectineal) folds in the pecten oculi. These snake-like accordion folds began at the cauda of the optic nerve and travelled distally into the vitreous humour via the fundus. The shape of pecten oculi was similar to that of a water-based sailboard. Pecten oculi's maximum average length and height were found to be 3.3780.061 mm and 5.9130.074 mm, respectively. Microscopically, the pecten oculi resembled a festoon of blood capillaries, with elastic, collagen, and reticular fibres that matched the structure of a spring diving board, which operates according to Hook's law. Melanocytes, melanosomes, and melanin granules were found in and surrounding pecten oculi blood capillaries. It is separated into three sections: the peak, the middle third, and the base. In the apex, the largest concentration of melanin was found. Acid and alkaline phosphatase activity in the pecten oculi was found to be very low histochemically. Glycogen activity was shown to be high in the optic nerve and collagen fibres of pectineal capillaries. Nucleated erythrocytes were seen ultrastructurally at the luminal area of pectineal blood capillaries with a tight intercellular endothelial connection. Primary and secondary lamellae containing pigment depositing globules were found in the luminal region of pectineal capillaries. Pecten oculi of Guinea fowl includes different anatomical properties as a haemostatic organ, phagocytosis, supplying source of energy to vitreous after diffusion, protecting eye from UV sunlight radiation, supplementing of nourishment, and providing oxygen to the retina to maintain visual acuity.
Author (S) Details
Pratiksha Mishra
Department
of Veterinary Anatomy and Histology, College of Veterinary and Animal science,
Udaipur, Rajasthan (RAJUVAS), India.
Balwant Meshram
Department
of Veterinary Anatomy and Histology, College of Veterinary and Animal science,
Udaipur, Rajasthan (RAJUVAS), India.
View Book :- https://stm.bookpi.org/NVBS-V2/article/view/3708
No comments:
Post a Comment