Anatomical and ultrastructural study of the pharyngeal bulb in Protodrilus (Polychaeta, Archiannelida). I. Muscles and myo-epithelial junctions.

  • C Jouin
  • Published 1978 in Tissue & cell
The pharyngeal bulb of Protodrilus is both a muscular and an epithelial organ whose function is the drawing up of food particles. The muscular system of the bulb is formed of tightly connected antagonistic muscles: the bulbus muscle and the sagittal and "grating plate" muscles. All of them are composed of obliquely striated fibers whose ultrastructural… CONTINUE READING