The esophageal lining comprises both granular and vacuolated cells. Granular cells are responsible for producing a sticky secretion that seems to serve the purpose of immobilizing and lubricating the prey, while the role of vacuolated cells remains uncertain.Within the intestinal epithelium, two main types of cells are found: gland cells and absorptive cells. Gland cells house large vacuoles that break open when food is ingested, and it takes several hours for them to return to their normal state. Absorptive cells, on the other hand, accumulate substantial deposits of fat and other materials as the process of digestion unfolds, with these accumulations gradually diminishing over time.The absorptive cells in the intestine are equipped with cilia. Although the exact function of these cilia is not definitively established, they may be involved in respiration and excretion. However, there is currently no evidence suggesting that they play a role in osmoregulation. The rectum is lined with a columnar epithelium that features cilia.