Achalasia is a disorder that prevents food from traveling to the stomach. It occurs when the lower part of the esophagus, the tube leading from the throat to the stomach, does not open up to allow food to enter the stomach.

Which body systems are not functioning properly, causing the symptoms of this disorder?

Which of the following shows the correct order in which light information travels through the eye? (2 points) lens, pupil, retina, optic nerve pupil, lens, retina, optic nerve pupil, lens, optic nerve, retina lens, pupil, optic nerve, retina

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Below are the three main organs that make up the plant body