Answer:
the esophageal sphincter
Explanation:
This muscle opens and lets food and liquid enter the stomach and closes to prevent the food and liquid from leaking back into the esophagus, however if it is not working properly it could open and close at the wrong times
The chef must first clean his hands before touching the bread
Sharps - includes disposable needles, scalpel blades, contaminated broken glass, dental burs, endodontic files and reamers. Toxic waste can have a poisonous effect. includes contaminated materials, as well as saliva-soaked gauze, used patient bibs & Surface barriers.