what are two divisions of the skeleton?
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These bones can be grouped in two divisions: axial skeleton and appendicular skeleton. The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum.
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Bone TissueEdit The bones of the human skeleton are comprised of two basic kinds of osseous tissue which differ in texture. Compact Bone appears very smooth and homogeneous.
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The axial skeleton forms the central axis of the human body and includes the bones of the skull, the ossicles of the middle ear, the hyoid bone of the throat, the vertebral column, and the thoracic cage (ribcage).
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A typical vertebra consists of (1) a body and (2) a vertebral arch, which has several processes (articular, transverse, and spinous) for articular and muscular attachments.
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The axial skeleton makes up our central axis and consists of the following bones: skull, vertebrae, ribs and sternum. The appendicular skeleton consists of the limbs and girdles. The girdles are the attachment points for the limbs.
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The primary divisions of the skeleton system are the head, thorax, and vertebral column. The human cranium supports the structures of the face and forms the brain cavity. The rib cage functions as protection for the vital organs of the chest such as the heart and lungs.
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The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate animal, including humans. The primary divisions of the skeleton system are the head, thorax, and vertebral column. The human cranium supports the structures of the face and forms the brain cavity.
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The Axial Skeleton The skeleton is subdivided into two major divisions—the axial and appendicular. The axial skeleton forms the vertical, central axis of the body and includes all bones of the head, neck, chest, and back (Figure 7.2). It serves to protect the brain, spinal cord, heart, and lungs.
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The two major anatomical divisions of the nervous system. Central nervous system. Consists of the brain an spinal cord. Peripheral nervous system.
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Besides bones, the skeletal system includes cartilage and ligaments. The skeleton is traditionally divided into two major parts: the axial skeleton, which includes the skull, spine, and rib cage; and the appendicular skeleton, which includes the appendages and the girdles that attach them to the axial skeleton.
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The human skeleton is the internal framework of the human body. It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together. The bone mass in the skeleton reaches maximum density around age 21.
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The bones of the human skeleton are divided into two groups. ... The axial skeleton includes the bones that form the skull, laryngeal skeleton, vertebral column, and thoracic cage. The bones of the appendicular skeleton (the limbs and girdles) “append” to the axial skeleton.
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There are two types of bone ossification, intramembranous and endochondral. Each of these processes begins with a mesenchymal tissue precursor, but how it transforms into bone differs.
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The human skull is generally considered to consist of twenty-two bones—eight cranial bones and fourteen facial skeleton bones. In the neurocranium these are the occipital bone, two temporal bones, two parietal bones, the sphenoid, ethmoid and frontal bones.
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The axial skeleton consist of: the skull, hyoid bones, vertebral column, ribs, and sternum.
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Vertebrae. Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx (Fig.
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Parts of the Sternum. The sternum can be divided into three parts; the manubrium, body and xiphoid process. In children, these elements are joined by cartilage. The cartilage ossifies to bone during adulthood.