第十二章单元测试
Mechanical digestion is the physical process of preparing the food for ________ and involves chewing, mixing, churning, and segmentation
_________ moves food through the alimentary canal and includes both swallowing and peristalsis.
___________ is the act of putting food into the mouth.
The digestive tract in an adult is about _______ long. Each of the organs shown above contributes to the digestive process in several unique ways.
The organs of the digestive system are located within a tube called the _____________.
A:absorption B:chemical digestion C:propulsion D:defecation
答案:chemical digestion
A:Digestion B:Swallowing C:Ingestion D:Propulsion
A:Eating B:Inputting C:Ingestion D:Chewing
A:20 feet B:30 meters C:20 meters D:30 feet
A:digestive system B:alimentary canal C:stomach D:trachea
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