They reached the brain’s narrowest capillaries. The river slowed to a crawl. Ahead lay the "Black Wall"—a jagged dam of fibrin and trapped platelets.
"It looks like a river," Halloway said, leaning on the railing. "The scans show it has banks, a flow, even tributaries. The settlers want to build a hydro-electric plant on the bend. They think they can tap the thermal energy." El Rio Viviente Isaac Asimov Pdf
: How the circulatory system acts as a heat distribution network to maintain a stable internal temperature. 4. Legacy and Impact The Living River They reached the brain’s narrowest capillaries