Question: A)Identify structures A and B B)What is the narrowest portion of B called? image This is a model of the ear showing outer, middle and

A)Identify structures A and B B)What is the narrowest portion of B called? image This is a model of the ear showing outer, middle and inner ear structures with arrow A pointing to a pink shell shaped projection composed primarily of elastic cartilage and arrow B pointing to a opening running from the outer ear to the middle ear. Question 1 options: 1) A)pinna, external auditory canal B)isthmus 2) A)pinna, external auditory meatus B)constrictor canal 3) A)pinna, external auditory meatus 4) A)pinna, eustachian tube B)isthmus

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