Postnatal developmental studies on the parathyroid gland of male Guinea pig with relation to bone formation | ||
| Benha Veterinary Medical Journal | ||
| Article 14, Volume 41, Issue 2, January 2022, Pages 66-72 PDF (2.05 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/bvmj.2021.92683.1466 | ||
| Authors | ||
| Aya Hamdy Tantawy* 1; Hossam Fouad Attia2; Ehab Mahmoud Elzoghby2; Mahmoud Abdelghaffar Emam2 | ||
| 1Histology department, faculty of veterinary medicine, benha university, Egypt | ||
| 2Histology Department, Faculty of Veterinary Medicine, Benha University, Egypt | ||
| Abstract | ||
| Blood calcium level can be controlled by the action of parathyroid gland on the bone via parathyroid hormone that responsible for bone mineralization. The study aimed to demonstrate the developmental histological structure of parathyroid gland and bone from one day after birth to twenty four month. Forty-five male Guinea pigs, immature and mature were used for this study. Samples were taken from parathyroid gland and bone and processed for histological examination. Parathyroid gland formed of fibrous capsule and fine septa extending to cellular parenchyma which contained both chief and oxyphil cells. From age of 1 day to 17 month, only chief cells with no differentiation were present in parathyroid gland. Chief cells cytoplasm might be granular, vacuolated or empty according to secretory activity of cells. At 18 month, oxyphil cells started to appear however, chief cells were differentiated into dark and light cells at 24 months. Compact bone was characterized by regular bone lamellae around vascular Haversian vessels that penetrated the bone instead of Haversian canals in Guinea pig. At early life, bone was not completely ossified forming from hyaline cartilage and spongy bone. Vertebrae were completely ossified at 4 month of age and consisted of spongy bone. At 2 weeks and 1 month, femur and ribs were completely ossified consisting of compact bone. | ||
| Keywords | ||
| Chief cells; oxyphil cells; Haversian vessels and Guinea pig | ||
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