I am Prof. Yasser A. Ahmed, the current Head of Histology Department, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt. I got MVSc from the Faculty of Veterinary Medicine, Assiut University, Egypt 2002, Ph.D. from the Faculty of Veterinary Sciences, University of Melbourne, Australia 2007. I was an Academic Visitor to Cambridge University (UK) 2005, UWM (USA) 2012, Bond University (Australia) 2015. My field of interest is the biology of cartilage and bone.