0 a small, round raised structure at the base of hair or teeth, or on the tongue, where it is involved in taste -- 乳突
Namely, the posterior type has lesions around the papilla and/or within the vascular arcade (posterior pole), but not in the peripheral area.
Each papilla consists of 2 morphologically distinct regions.
Hypothetically, glandular secretions are involved in tissue degradation (disintegration of the papilla and attached sucker following pairing) and fusion of the adjacent tegument.
Cervical papillae situated at margin of cephalic and cervical regions.
No evidence has been observed in this study that the contents of the pear-shaped cells are released through the tegument of the papillae.
It is possible that there are two other types of papillae.
In the adult worm, this papilla becomes dome-shaped with a small central stoma.
Once both ventral suckers are attached to their respective papillae, lysis and fusion of the adjoining tissues begin.
