Portal hypertension is a term used to describe elevated pressures in the portal venous system (a major vein that leads to the liver). Portal hypertension may be. caused by intrinsic liver disease, obstruction, or structural changes that result in increased portal venous flow or increased hepatic resistance.
Quick Answer. Tumblebooks are pre-existing picture books in e-reader format that have added animation effects, narrated story and dialogue, enhanced sounds and music appropriate to the story. This content engages children and encourages them as they learn to read. Adults and children can read the books or have them read by the program.
(June 2010). In comics, a trade paperback (often shortened to TPB, TP or trade) is a collection of stories originally published in comic books, reprinted in book format, usually capturing one story arc from a single title or a series of stories with a connected story arc or common theme from one or more titles.or many years, trade paperbacks were mainly used to reprint older comic-book stories that were no longer available to the average reader, when original copies of those stories were scarce and hard to find, and often very expensive when found due to their rarity.