一个婴儿有多少块骨头的英文？
编辑：自学文库
时间：2024年03月09日
A baby has around 270 bones at birth, which eventually fuse together to form 206 bones in adulthood. The reason for this discrepancy is that some of the baby's bones are initially in separate pieces called cartilage, which gradually harden and join together as the baby grows. This process, known as ossification, helps create a sturdy skeletal structure for healthy development and movement. As the baby reaches adulthood, some bones in the skull and spine fuse, resulting in a decrease in the total number of bones. Therefore, a baby has more bones than an adult due to the presence of these yet-to-be-fused cartilage bones.