question: What transports oxygen to the brain?
choices.text: microscopic organisms some prokaryotes feedback mechanisms chemical messengers animals with backbone aquatic organisms a fluid connective tissue prokaryotic cells
choices.label: A B C D E F G H
fact2: Blood carries oxygen to the brain.
combinedfact: A fluid connective tissue carries oxygen to the brain
formatted_question: What transports oxygen to the brain? (A) microscopic organisms (B) some prokaryotes (C) feedback mechanisms (D) chemical messengers (E) animals with backbone (F) aquatic organisms (G) a fluid connective tissue (H) prokaryotic cells