2. Assuming you inhale through your nose, list the pathway a molecule of oxygen would follow starting with inhalation and ending with diffusion to a muscle fiber. List all the structures the O2 molecule passes through in the respiratory and circulatory systems, including the types of blood vessels, as it makes its way to a muscle cell. (Excluding Valves)

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.