In the general, the number of electrons that would fill an atom’s outer shell and make it nonreactive is _____.

The level of organization one step more complex than the organ level is the _______________ level.

This sphincter is found between the stomach and the duodenum:

This sphincter is found between the stomach and the duodenum:

Bile is produced in the ____________________ but concentrated and stored in the ________________.

Bile is produced in the ____________________ but concentrated and stored in the ________________.

This layer of the digestive tract causes peristalsis, the movement of food through the digestive tract:

Identify this portion of the large intestine (2 word answer):

This organ of the digestive system produces the majority of enzymes:

Identify this area of the stomach: