手部保护手是人体器官中最为精细致密的器官之一。它由27块骨骼组成,占人体骨骼总数的1/4,而且肌肉、血管和神经的分布与组织都极其惊人的复杂,仅指尖上每平方厘米的毛细血管长度就可达数米,神经末梢达数千个。这些精细的神经网络可以使我们在几微秒内觉察到冷、热、疼痛等,甚 Hand protection Hand is one of the most delicate and dense organs in human organs. It consists of 27 bones, accounting for 1/4 of the total number of human bones, and muscle, blood vessels and nerves are extremely astonishingly complex distribution and organization, only a few meters per square centimeter of capillaries on the fingertips, nerves Up to thousands of distal. These sophisticated neural networks can make us aware of cold, heat, pain, etc. in a few microseconds