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.
Sphincters are found in many animals; there are over 60 types in the human body, some microscopically small, in particular the millions of precapillary sphincters. Sphincters relax at death, possibly releasing fluids.