Example sentences. 1  If three letters together represent a single sound, they constitute a trigraph, such as tch in catch and sch in schmaltz. 2  Similarly, to take the consonant trigraph t c h, the teacher can explain that in this word the three letters together âsayâ the sound. Similarly, to take the consonant trigraph t c h, the teacher can explain that in this word the three letters together âsayâ the sound. 2  Both digraphs and trigraphs in French have their origin in history and phonology.
The six different sphincters in the digestive system are the upper esophageal sphincter (UES), the cardiac sphincter, the pyloric sphincter, the ileocecal sphincter and the involuntary and voluntary anal sphincters.s food progresses through the body, it moves through the different sphincters in the digestive system. In total, there are six sphincters in the digestive system, which have the general role of controlling the direction and movement of material.
First one is the Upper Oesophageal Sphincter, which allows entry of a food bolus into the oesophagus. Then the Lower Oesophageal Sphincter (also known as cardia, or cardiac sphincter), found at the entrance to the stomach. This stops reflux of food back up the oesophagus. Next is the pyloric sphincter, which allows stomach contents into the duodenum (small intestine) for further digestion. Then the ilio-caecal valve, which isn't a sphincter, but mediates movement of small intestine contents into the large intestine (caecum).