原版-【3D演示】肌肉系统（原版+字幕版）

热门回复：

• 刘忠宝环球粉丝会首席:Three types of muscles are contained within the human body, smooth, cardiac and skeletal muscles. Smooth muscles are found in the walls of many organs such as the stomach and in blood vessels. They have a non-serrated appearance and contract involuntarily. Cardiac muscles are found in the walls of the heart. They also contract involuntarily but have created appearance.
• escapist:很好吃的样子(¯﹃¯)
• 刘忠宝环球粉丝会首席:Tree type muscles contain with the human body.
• bili_26926278860:感谢