The small intestine does most of the work of chemical digestion via enzymes secreted by the ______________.

单选题

The stomach is separated from the esophagus and the small intestine by the esophageal sphincter and the _______________ sphincter respectively.

答案解析

单选题

The small intestine does most of the work of chemical digestion via enzymes secreted by the ______________.

答案解析

单选题

Several enzymes from the pancreatic juice and lining of the intestine carry out the breakdown of huge _________ molecules into small molecules called amino acids.

答案解析

单选题

Which of the following root means intestine ?

答案解析

单选题

The interior wall of the small intestine contains finger-like folds of tissue called ______________, which catch food molecules and pass them into exterior capillaries and then to larger blood vessels.

答案解析