Development of bone begins from mesoderm in the embryonic life (from sixth week) and a good number of bones of the human body continue to grow until a person reaches about twenty-fifth years. There are two processes of ossification-intramembranous and intracartilaginous (endochondral). The bones of the cranial vault and the mandible are membranous in origin. The bones of the limbs, [...]
In this article we will discuss about:- 1. Origin and Development of Cardiac Muscle 2. Histology of Cardiac Muscle 3. Fine Structure 4. Blood Vessels, Lymphatics and Nerves 5. Metabolism. Origin and Development of Cardiac Muscle: Cardiac muscles in the embryo are originated from the mesenchymal tissue. They are formed of the splanchnopleure adjoining the endothelium of the cardiac primordium. [...]
In this article we will discus about the factors controlling calcification of bones in humans. Also learn about the proportion of inorganic compounds in bone. i. Protein constituent of the cartilage has got affinity towards Ca++ and adsorbs calcium readily. However this favours the deposition of calcium as tricalcium phosphate. ii. Reduction of protein concentration in the blood and also [...]