I've always loved science. In the fifth grade, I had a lot of questions about science: how do cars use oil as power? What is the principle of battery power generation? What is Tianlei...... However, since I got to know the book close to science, many problems have been solved! Diary winter vacation diary 0s net.Cn
Today, I can't help but open a new book close to science, one of which, secrets of human body, immediately attracted my attention and made me curious. I thought: what secrets can human body have? This curiosity made me turn to this page to find the answer -- 'chapter one bones', what? Bones have secrets? Bone is not the whole body. Welcome to wechat: ww4hw for more knowledge. 206 bones together? The joints on the bones are also very common. The joints that connect the bones are all the same, just different in size. After reading this article, I found that I was wrong. The original joint is divided into four parts: hinge joint, rotation joint, saddle joint and spherical joint??????
Science has been helping people, and people are surrounded by science. Let's be good at observing, reading and searching the science around us.