![]() ![]() Anterior fontanell or Frontal fontanell is largest and it closes by 18 to 24 months of age. An infant may have many fontanelles at birth but generally six are recognised. Fontanelles are the soft areas present in foetal cranium. Each temporal bones bear opening of external auditory meatus. The two occiptial condyles are articulated with atlas vertebra by hinge joints for performing nodding movements. Because of the presence of two occipital condyles, human skull is called dicondylic. ![]() There are two lateral protuberances or occipital condyles, one on each side of foramen magnum. Through foramen of magnum brain communicates with spinal cord. At the base of skull occipital has a very large opening called foramen of magnum (largest foramen). They are jointed with one another by fixed interdigited joints called sutures. (i) Frontal-1 (ii) Parietal-2 (iii) Occipital-1 (iv) Temporal-2 (v) Sphenoid-1 (vi) Ethmoid- 1.Ĭranial bones are flattened bones. Bones constituting the cranium are called cranial bones. It is the bony structure which encloses the brain and protects it. Skull consists of four parts - cranium, facial bones, hyoid and ear bones.Ĭranium (Brain Box, 8 bones). It constitutes skeleton of the head region. ![]() Axial skeleton has 80 bones forming four structures - skull, vertebral column, sternum and ribs. It is part of endoskeleton which occurs along the middle longitudinal axis of the body. The bones are arranged into axial and appendicular skeleton. Human skeleton is made of 206 bones which have formed from some 300 bones through fusion. ![]()
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