Pinna
The only part of the pinna that does not contain cartilage
What is the lobule?
The most medial 2/3 of the external auditory canal is surrounded by this
What is bone?
The three bones making up the ossicles
What are the malleus, incus and stapes?
The smallest of the three ossicular bones
What is the stapes?
This is the name for opening to the auditory canal
What is the external auditory meatus?
The outer ear terminates at this structure
What is the tympanic membrane?
The middle ear is bounded laterally by the tympanic membrane, and medially by this
What is the oval window?
The name for the point where the malleus attaches to the tympanic membrane
What is the umbo?
The most outer rim of the ear
What is the helix?
The length of the bottom portion of the auditory canal differs from the top in this way
What is longer?
This structure connects to the nasopharynx and helps in pressure equalization
What is the eustachian tube?
This bone has two processes, referred to as the long and short process.
What is the incus?
The antihelix splits into these two branches
What are the crus superior and crus inferior?
The name for the narrowed region of the auditory canal where cartilage and bone meet
What is the isthmus?
The malleus and incus bones attach via this kind of joint
What is a saddle joint?
The tympanic membrane sits at this angle (give a number)
What is 55 degrees?
Though some people can move their ears, for many, the extrinsic muscles of the pinna are this, meaning no longer serving a function
What is vestigial?
The cartilaginous portion of the canal has these two types of glands present
What are sebaceous and ceruminous glands?
This muscle attaches to the malleus and pulls the ossicular chain anteriorly
What is the tensor tympani?
This muscle is innervated by cranial nerve 7 (Facial)
What is the stapedius?