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.
anal sphincter, sphincter aÂ´ni sphincter muscle of anus (external or internal). cardiac sphincter, cardioesophageal sphincter muscle fibers about the opening of the esophagus into the stomach. external sphincter of female urethra external sphincter muscle of female urethra.external sphincter of male urethra external sphincter muscle of male urethra.ardiac sphincter a sphincter between the esophagus and the stomach, opening at the approach of food that can then be swept into the stomach by rhythmic peristaltic waves. sphincter of Oddi a sheath of muscle fibers investing the associated bile and pancreatic passages as they traverse the wall of the duodenum.