Midterm Flashcards
Which is the organ of vision
Eyes
It is sometimes compared to a camera lens because it works roughly the same way as the latter which focuses images of objects at various distances on the films as it moves toward or away from the place of the film.
Eye
This surface in the eye
Retina
retina is composed ___, the photosensitive cells that convert light energy into neural signals
rods and cones
conical in shape
Cones
Cones in number
more than six million
allow us to see the different wavelengths of light as different hues or colors.
Cones
cylindrical
Rods
Rods in number
one hundred million
do not distinguish colors but more sensitive to light than are the cones.
Rods
The sense of organ for hearing
Ear
Sensitive to sound waves, the mechanical vibrations in the air.
Ears
Parts of the Ear
Outer ear
Middle ear
Inner ear
The outer ear consists of the pinna, or auricle, and the ear canal (external auditory meatus).
The middle ear – it is the part of the ear between the eardrum and the oval window. The middle ear transmits sound from the outer ear to the inner ear. The middle ear consists of three bones: the hammer (malleus), the anvil (incus) and the stirrup (stapes), the oval window, the round window and the Eustachian tube
The inner ear - The inner ear contains the sensory organs for hearing and balance. The cochlea is the hearing part of the inner ear. The semicircular canals in the inner ear are part of our balance system. The cochlea is a bony structure shaped like a snail and filled with two fluids (endolymph and perilymph
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