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1|Page, SKELETAL SYSTEM, , Skeletal system constitutes hard internal or external living or non-living parts that form, the supporting framework of the body., , It is divided into 2 parts :, , Exoskeleton , Itis a hard, protective and supportive framework which Is produced by ectoderm., Endoskeleton , It is a hard, supportive framework which is produced by mesoderm., , HUMAN ENDOSKELETON, Divided into two main parts,, , ¥ Axial Skeletonn, , ~ Appendicular Skeleton, , Axial Skeleton:, , Total no. of bones is 80., , It lies along the principal axis of the body, It includes skull, vertebral column, ribs and, sternum., , Skull , Skull consists of two main parts, - Cranium, -Face., Cranial Bones, ( Total no. of bone = 8), 1. Frontal Bone, 1, Il. Parietal Bone, 2, Ill. Temporal Bone, 2, IV. Occipital Bone, 1, V. Sphenoid Bone; 1, VI. Ethmoid Bone, 1, Facial Bones, ( Total no. of bones = 14), Inferior Nasal Concha, 2, Nasal Bones, 2, Lacrimal Bones, 2, Zygomatic Bones, 2, Maxilla, 2, Mandible, 1, Palatine Bones, 2, Vomer, 1, , RFRAS<SBRp., , VI, , , , , , Scanned by CamScanner