六、骨骼:骨骼是人体坚硬的支架,它支撑住身体各部的软组织,使人体具有一定的形状,骨骼还保护脑、脊髓、心、肺、膀胱等内脏,使外力不易损伤这些重要的器官。婴儿的骨骼比较柔软,软骨较多,骨较短细,骨化(钙盐沉积在骨中使骨质变硬)还在不断进行中,随年龄增长,骨骼不断伸长增粗变硬。骨的成分是由有机物和无机物(钙、磷等)构成。有机物使骨具有较大的韧性和弹 Sixth, bones: Skeleton is a hard stent, which supports the soft tissues of various parts of the body to make the human body have a certain shape. The bones also protect the viscera such as the brain, spinal cord, heart, lungs and bladder so that external organs can not easily damage these important organs. Infant’s bones are relatively soft, cartilage more, shorter and thinner bone, ossification (calcium deposition in the bone to make the bone harden) is still ongoing, with age, the bones continue to grow thicker and harder. Bone composition is composed of organic and inorganic (calcium, phosphorus, etc.). Organics make the bone more resilient and resilient