21. Geranylgeranyl pyrophosphate is utilised as a chemoattractant for migrating germ cells that have traversed the midgut epithelia. 22. Tumors from midgut cells, such as ileal carcinoid usually contain and release large quantities of serotonin. 23. The midgut loops slips back out of the umbilical cord and the physiological hernia ceases to exist. 24. Virions invade the columnar cells of midgut epithelium and integrate DNA into the nucleus of midgut cells. 25. Virions invade the columnar cells of midgut epithelium and integrate DNA into the nucleus of midgut cells. 26. The midgut ( mesenteron ) is the largest organ in harvestmen and fills most of the opisthosoma. 27. Zygotes then develop into a motile form called an ookinete, which penetrates the wall of the midgut . 28. Carbohydrates are digested mainly in the crop, while proteins are digested in the ceca of the midgut . 29. They are most commonly found in the midgut at the level of the ileum or in the appendix. 30. The digestive system in both Ixodid and argasid ticks is histologically divided into foregut, midgut and hindgut.
