BBC3 年
The structure of the digestive system
The digestive system breaks down ... that's the small intestine. Squeeze out the remaining liquid. This is all the nutrients your body needs to function properly and collect it all up in the ...
BBC3 年
The structure of the digestive system
The digestive system breaks down ... that's the small intestine. Squeeze out the remaining liquid. This is all the nutrients your body needs to function properly and collect it all up in the ...