Endochondral bone - is dense and has a system of Haversian canals through which blood vessels can pass. Cartilage forms from the fibrous tissue. Finally, a bone matryx replaces the cartilage. Intermembranous bone - develops between two layers of fibrous connective tissue without the cartilage stage. The flat bones that form this way are not dense and do not have a system of Haversian canals.
All components are somatic in origin.
Nerves for the integumentary sense organs. Visceral components Nerves for the digestive tract. Nerves for the internal organs. Scoring criteria Use the Internet to find a drawing or diagram clearly showing the five regions of the vertebral column of a bird or mammal. Use the program of your choice to make a digital picture with the regions labeled.