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一、从一个受精卵到八大系统人的外形千姿百态,人体结构却大致相同。正常的人都有运动、呼吸、循环、消化、泌尿、生殖、内分泌、神经等八大系统。都有心、肝、胃、肾、肺、脾、胆、耳、鼻、舌等器官,都有一双手、两条腿,都有二百零六块骨头,六百三十七块肌肉,等等。人体的这些器官、系统是怎样形成的?自古以来,人们有过种种说法。十六、十七世纪,维萨里、哈维等人虽然详细解剖了人体,发现了血液循环,却解释不了人为什么有一双手、两只脚,为什么
First, from a fertilized egg to the eight systems of human appearance mix, the human body structure is roughly the same. Normal people have exercise, breathing, circulation, digestion, urinary, reproductive, endocrine, nervous and other eight systems. There are heart, liver, stomach, kidney, lung, spleen, gallbladder, ear, nose, tongue and other organs, have a pair of hands, two legs, have two hundred and six bones, six hundred and thirty-seven muscles, and so on . How do these organs and systems of the human body form? Since ancient times, people have all kinds of opinions. Sixteenth and seventeenth centuries, Vaisari and Harvey, though they dissected the human body in detail and found blood circulation, did not explain why people have two hands and two feet. Why