Which is a correct statement about the process shown in the diagram?

Question

The diagram represents a portion of the esophagus. Which is a correct statement about the process shown in the diagram?

1) It transports nutrients within the digestive tract.
2) It must occur prior the mechanical digestion of food in the oral cavity.
3) It emulsifies fats for hydrolysis in the small intestine
4) It increases water absorption by the esophagus

this is the picture:

http://schoolisland.com/review/Courses/le/bio106.gif

thanks.

Answer 1

1. transports nutrients

It's a picture of peristalsis - the way the muscles squeeze the food along through the digestive system.

Answer 2

you re welcome

Answer 3

you're welcome.
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