The Human Ear (Grade 12 NSC Matric Life Sciences): Flashcards
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Two functions of the ear
Two functions of the ear
Hearing and balance
Three main sections of the ear
Three main sections of the ear
Outer, middle, and inner ear
Function of pinna
Function of pinna
Collects sound waves from different directions
Three ossicles (bones in middle ear)
Three ossicles (bones in middle ear)
Hammer (malleus), anvil (incus), stirrup (stapes)
Function of Eustachian tube
Function of Eustachian tube
Equalises air pressure on both sides of eardrum
Function of semi-circular canals
Function of semi-circular canals
Detect head movements in 3D space
What are cristae
What are cristae
Balance receptors detecting head speed and direction changes
Function of maculae
Function of maculae
Detect head position changes relative to gravity
Function of cochlea
Function of cochlea
Converts sound vibrations to nerve impulses
Location of organ of Corti
Location of organ of Corti
In the cochlea