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Summary
Summary the skeleton system.
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The skull is formed by 22 bones: the cranium (8 bones) and facial bones (14 bones). The cranium protects the brains and is composed of eight bones fitted tightly together in adults. In newborns, certain bones are not completely formed and instead are joined by membranous regions called fontanelles (see Figure 4.4), commonly called “soft spots.” Fontanelles allow the bones of the skull to compress during childbirth and expand to accommodate a rapidly growing infant brain. These regions begin to close around two months but may last up to two years.
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- October 13, 2021
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- 2021/2022
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- Summary
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