论文部分内容阅读
什么是肠蠕动? 肚子里头的那些管子叫肠子。实际上那些管子是一整根,不过是分成了两段罢了。上段跟胃连着。这是一段大约有18英尺长的细管,叫做小肠。因为它是盘曲起来的,所以不占很大地方。与上段相通的下段管子,短而粗,叫做大肠。食物从胃里出来以后,就进入这些管子。在小肠里面,身体从食物中吸收它所需要的养料,然后把它
What is peristalsis? The tubes in the stomach are called intestines. In fact, those pipes are a whole lot, but divided into two sections. Upper stomach with the stomach. This is a small tube about 18 feet long, called the small intestine. Because it is coiled up, it does not occupy a large place. The lower part of the pipe connected to the upper part is short and thick and is called the large intestine. After the food comes out of the stomach, it enters these tubes. In the small intestine, the body absorbs the nourishment it needs from food and then takes it