A
Absorbtion:
Transfer of a substance to the bloodstream or lymphatic system from the intestinal tract, body surfaces or tissues.
Alginate:
A substance which is swallowed to form a viscous "raft" floating on the stomach contents. The "raft" provides a barrier preventing, acid refluxing into the oesophagus.
Antacids:
A drug which is swallowed to neutralize acid in the stomach and oesophagus.

D
Digestion:
Process of breaking down foods into small molecules for absorption

E
Enzyme:
A protein molecule produced by living organisms that catalyses chemical reactions of other substances without itself being destroyed or altered upon completion of the reactions.

G
Gastro-oesophagael reflux:
Movement of gastric content from the stomach back into the oesophagus.
Gastro-oesophageal reflux disease (GORD):
A disorder in which there is recurrent return of stomach contents back up into the oesophagus, frequently causing heartburn.

H
Heartburn:
A burning sensation behind the breastbone associated with reflux of gastric contents into the oesophagus.

I
Indigestion:
Upper abdominal discomfort usually associated with the ingestion of certain foods.

O
Oesophagus:
The narrow muscular tube connecting the pharynx and stomach (Food pipe)

R
Reflux:
Backward flow, for example of bile acid from the duodenum to the stomach or acidic stomach contents to the oesophagus (gastro-oesophageal reflux).
Reflux suppressant:
A treatment that produces a physical barrier to help prevent the stomach contents moving back up into the oesophagus (food pipe).
Regurgitation:
The bringing up of undigested food from the stomach to the mouth

S
Salvia:
Alkaline liquid secreted into the mouth.
Salivary Glands:
Glands that produce salvia.
Sphincter:
A circular muscle surrounding an orifice.