Shared Flashcard Set

Details

April 26th
pages 342-249
11
Anatomy
Undergraduate 1
04/25/2013

Additional Anatomy Flashcards

 


 

Cards

Term
Pinna
Definition
  • the fleshy part of the ear attached to the side of the head
  • covereed by skin
  • composed of elastic cartilage, fat, and fibrous tissue
  • collects sound waves and channels them into the external auditory canal
Term
External Auditory Canal
Definition

 

  • 2.5 cm long
  • leads from the pinna to the tympanic membrane (eardrum) of the middle ear
  • lateral half is surrounded by soft tissue
  • medial half is encased in the temporal bone of the skull
  • lined with skin
Term
Tympanic membrane
Definition
  • later wall of the middle ear
  • eardrum
Term
Auditory ossicles
Definition
  • tiny bones
  • transfer sound waves from the tympanic membrane to the inner ear
Term
Oval window
Definition
  • opening between the middle ear and the inner ear
Term
Auditory tube
Definition
  • runs medially and inferiorly from the tympanic cavity of the middle ear to the nasopharync. 
  • enables air to enter or leave the middle ear in order to normalize air pressure within the tympanic cavity
Term
Cochlea
Definition
  • hearing part of the inner ear
  • snail-like hollow tube coiled upon itself for 2.5 turns
  • captures sound waves and converts them into nerve impuleses
Term
Organ of Corti
Definition
  • a strip of tall receptor cells with cilia that detect sound waves
Term
basilar membrane
Definition
  • where hair cells perch
  • moves in relation to the tectorial membrane in order to allow the hair-cell tips to flex back and forth with each wave
Term
Hair cells
Definition
Term
Tectorial membrane
Definition
  • tips of hair cells are embedded
  • move in relation to basal membrane
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