The outer ear consists of two things and they are the auricle and the ear canal , which is also called the auditory canal.
The auditory canal goes from the outer ear to the middle ear.
The auricle is what we see of the ear...the physical part of the ear. It can be called the pinna as well.
I hoped that this helped and good luck.
If you are doing a quiz...then maybe you need this...
https://quizlet.com/137205156/exam-3-bio-102-gleeson-flash-cards/
Answer:
all of the above can lead to increase in nitrogen
