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.
The definition of a tumble is an act of somersaulting, stumbling or falling, or disorder or confusion. An example of a tumble is a stumble down a hill. An example of a tumble is mass chaos. Tumble is defined as to do somersaults, fall clumsily or stumble, or to cause someone or something to fall.