The Pharynx
The pharynx is the muscular and glandular part of the digestive system between the stoma and the intestine . It is separated from the intestine by a cardia (pharyngeo-intestinal valve) that restricts regurgitation (A). The silhouette of the pharynx may be three part with the corpus (anterior) separated from the end bulb (posterior) by a narrow isthmus (A). However in many nematodes the silhouette is expressed as one (B, C) or two parts (D-G). To see through the microscope click here
Fig. 4. A. General parts of the pharynx. B.
One part pharynx. C. Two-part pharynx with ventriculus. D.
Two-part esopagus with basal bulb. E. Two-part pharynx with
posterior part specialized as a stichostome. F. Two-part pharynx
with posterior part cylindrical. G. Two-part pyriform-shaped
pharynx. H. Three-part pharynx lacking a metacorpus.
I. Three-part pharynx with a metacorpus and basal bulb. J.
Three-part pharynx with a basal glandular lobe.