The Growth Cartilage and Beyond: Absence of Medullary Bone in Silver Carp Ribs

Department of Histology, Faculty of Veterinary medicine, South Valley University, Qena, Egypt.
Corresponding Author: Soha A. Soliman, Department of Histology, Faculty of Veterinary medicine, South Valley University, Qena, Egypt Tel: +47 67964599 E-Mail: [email protected]

Received Date:20 Sep 2018   
Accepted Date: 2: 29 Sep 2018  
Published Date: 03 Oct 2018

Copyright © 2018 Soliman AS

Citation: Soliman AS. (2018). The Growth Cartilage and Beyond: Absence of Medullary Bone in Silver Carp Ribs. Mathews J Cytol Histol. 2(1): 008.

ABSTRACT

The histological features of the ventral ribs were identified using semithin sections. The ventral rib had two cartilaginous ends and an elongated body. The cartilaginous ends exhibited typical zonal organization of the growth plate. The body was comprised of bone collar and the medullary cavity. Chondrocytes were organized in the resting, proliferating and hypertrophic zones. Cartilage matrix subjected to extensive degradation and erosion particularly by Chondroclasts. At the level of the hypertrophic zone, perichondral bone was formed and small projections of the bone tissues extended to the cartilage matrix. However, no medullary bone was formed beyond the hypertrophic zone. Cartilage erosion was also identified in the sub-osseous tissue and in the interior cartilage matrix. In the body of the ventral ribs, a remnant of the hypertrophic zone was surrounded by perichondral bone. Chondroclast was detected at the eroding surface of the cartilage matrix. Active osteoblasts, that had an oval or columnar in shape, were aligned at the surface of the bone collar as well as the resting osteoblasts. In conclusion, ventral ribs of the silver carp grow by perichondral bone formation in addition to the linear expansion of the growth cartilage.