Organisms respond to an array of different environmental stimuli. Most responses to stimuli occur through the presence of accessory structures such as ears, nose, and eyes. Within each of these larger sensory structures are sensory neurons. Information is detected though these structures in three different ways. The first way is the sense organ can be directional as it gives different signals if turned toward or away from the source of the stimulus. The second way is when signals are obtained from a pair of similar sense organs and are compared. An example of this is hearing via two different ears. The third way is signals can be compared together in time and space.
Comments
Suggestion
You might be able to combine sentences for better flow. For example, you could combine the third and fourth sentences together.
Suggestion
I would recommend adding some substance to a few of your sentences. For example, your sentence, "Information is detected though these structures in three different ways. " I feel like this sentence is almost unnecessary. Also, I would refrain from using "first way," "second way," etc.
Suggestion
In the first sentence, you use the word "Organisms" yet moving forward you focus on sensory systems like the ears, eyes, and nose, which are only present in animals. I think you should either focus on organisms more broadly and should include examples of plant, bacterial, or other non-animal sensory systems, or else specify that you are talking about animals.