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维生素D与钙、磷的代谢密切相关。其主要作用是促进小肠对钙、磷的吸收,并对骨组织中的沉钙成骨有直接促进作用。在人体,儿童缺乏维生素D会导致软骨病(佝偻病),成人则发生骨软化病。在动物(主要是幼小动物)维生素D缺乏症一般表现为生长抑制、体重降低、行动迟缓、姿势异常、肌肉无力等症状。用白鼠作为实验对象,可在较短的时期内看到维生素D对其健康的明显效应。实验动物的选择观察维生素D与健康的关系,应用幼小动
Vitamin D and calcium, phosphorus metabolism is closely related. Its main role is to promote the intestinal absorption of calcium and phosphorus, and calcium in bone tissue has a direct role in promoting bone formation. In the human body, children lack of vitamin D can cause rickets (rickets), adult osteomalacia. In animals (mainly young animals) vitamin D deficiency generally manifested as growth inhibition, weight loss, slowness, postural abnormalities, muscle weakness and other symptoms. Using white mice as experimental subjects, the obvious effect of vitamin D on their health can be seen in a relatively short period of time. The choice of experimental animals Vitamin D and health relations, the application of young animals