The Digestive Syctam - I.iver 1. Liver divided into basic units calle 2. Within lobule are liver cells called 3. Permeable capillaries that form passageways between cells and empty into a central vein are called 4. engulf p 5. The portal triad consists of: a. b. c. uucts carrying oue rrom iver ana gallolaader and pancreatic juice from pancreas to the duodenum.