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The Structure And Development Of The Human Skeletal System

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The Human Skeletal System Assignment 1: Essay The human skeleton provides the internal framework of the human body and comprises of 270 bones at birth, decreasing to 206 bones by adulthood. The reason for this decrease, is that by adulthood, some bones that were once separate have become fused together. Most of the unfused bones in infants can be found in the skull, this is to allow for an easier transition through the pelvis in childbirth. Unfused bones can also be found in the arms and legs, to allow for growth into adolescence, when some of the unfused bones will become fused. Bones of the human body can be classified into two sections. The axial skeleton and the appendicular skeleton. The axial skeleton contains 80 bones and can be seen in the image (01). The bones comprise of: • 8 Cranial Bones • 14 Facial Bones • 1 Hyoid Bone • 6 Auditory Ossicles Bones • 26 Bones of the Vertebral Column • 25 Bones of the Thorax The appendicular skeleton is made up of 126 bones and can be seen in the image (01) The bones exist in the following regions: • 4 – Shoulder Girdle. • 60 – Arms/Upper Limbs • 2 – Hip Girdle • 60 – Legs/Lower Limbs. (01)(Weebly, 2017) The major bones of the human body can be seen in the image (02) and consist of the following: • Cranium • Mandible • Hyoid • Clavicle • Sternum • Ribs • Scapula • Humerus • Radius • Ulna • Tarsals • Metatarsals • Phalange • Carpals • Metacarpals • Vertebrae • Ilium •

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