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BBC3 年
The structure of the digestive system
The digestive system is made up of key parts, each of which has a different function. Food passes through most of these parts in a journey from the mouth to the anus. Stomach This is a muscular ...
BBC3 年
The structure of the digestive system
The digestive system is made up of key parts, each of which has a different function. Food passes through most of these parts in a journey from the mouth to the anus. Stomach This is a muscular ...
来自MSN11 个月
Peristalsis: How Food Moves Through Your Digestive System
Peristalsis describes the involuntary wave of muscle contractions that happen naturally in your digestive tract. This automatic bodily function physically ... your digestive system moving smoothly.