Agroup of students are studying for an examination on the gastrointestinal (gi) system and are reviewing the structures of the esophagus and stomach. the students demonstrate understanding of the material when they identify the opening between the stomach and duodenum?

Pyloric sphincter

Explanation:

The duodenum is the first section of the small intestine, it is connected to stomach by pylorus (which means "gatekeeper"). The pylorus ends as the pyloric orifice which is surrounded by a  band of muscle named "pyloric sphincter" it is located exactly in the junction between stomach and duodenum.

answer; ///i believe the correct answer is (

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed