1.in a famous science fiction movie, a group of scientists in a submarine are miniaturized and injected into a patient's bloodstream. their mission is to travel to the patient's brain and remove a blood clot that has caused the patient to become comatose.
during their journey to the brain, the shrunken scientists encounter many of the structures discussed in this lesson and have some dangerous encounters with them. they have to move quickly to avoid being attacked by the patient's immune system, which recognizes them as foreign objects.

for this discussion, imagine yourself as one of these scientists. respond to the following questions from the viewpoint of traveling through a patient's bloodstream in a miniaturized submarine.