Question

3. List each of the structures, in order, that food must path through as it is digested.

4. Occasionally, the esophageal sphincter fails to close tightly and gastric juice backs up into the esophagus, resulting in “heart burn”. Explain why gastric juices have this effect on the esophagus and not the stomach.

Answer 1

the digestion of the body is completed through series of structures these are

mouth

oesophagus

stomach

smallintestine

large intestine

rectum

these are the structures for which food is passed.

food get into body through mouth and by mixing with saliva goes into eosephagus via pharynx and throat digestion starts in the mouth only by several enzymatic activities and then goes further alimentary canal and digestion process ocurs

problem of failure of oesophageal sphincter failure or heart burn is seen in GERD ( gastro esophageal reflux disease ) in which gastric juice irritates the oesophagus and creates a problem of heart burn and great acidity it doesnot affect the stomach because has a epithelial layer that secretes the mucous that creates a mucosal barrier bewteen acid and stomach and so it has effect on oesophagus which doesnot have this barrier.