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THE SENSES "8.2" (VISION (LIGHT ENTERS THE EYE THROUGH THE PUPIL…
THE SENSES "8.2"
VISION
LIGHT ENTERS THE EYE THROUGH THE PUPIL AND REACHES THE LENS, A FLEXIBLE STRUCTURE THAT FOCUSES LIGHT ON THE RETINA.
OPTIC NERVE: THE NERVE THAT CARRIES IMPULSES FROM THE RETINA TO THE BRAIN.
THE HUMAN EYE PARTS: EYE MUSCLE , RETINA , OPTIC NERVE , BLIND SPOT , MUSCLE , CORNEA , PUPIL , IRIS , LENS.
BINOCULAR FUSION
THE PROCESS OF COMBINING THE IMAGES RECEIVED FROM THE TWO EYES INTO A SINGLE , FUSED IMAGE.
RETINAL DISPARITY IS ESSENTIAL TO YOUR DEPTH PERCEPTION. THE BRAIN INTERPRETS A LARGE RETINAL DISPARITY TO MEAN THAT A ONJECT IS NEABY.
NEARSIGHTED & FARSIGHTED: IF YOUR EYEBALL IS TO LONG YOU ARE NEARSIGHTED. IF YOUR EYEBALL IS TO SHORT YOU ARE FARSIGHTED
HEARING
Hearing depends on vibrations of the air, called sound waves. Sound
waves from the air pass through various bones
Auditory nerve: The nerve that carries impulses from the inner ear to the brain , resulting in the perception of sound.
Loudness of sound is determined by the amplitude, or height, of sound
waves. The sounds humans hear
range upward from 0 decibels,the softest sound the human ear can detect,
to about 140 decibels,which is roughly as loud as a jet plane taking off.
THE SKIN SENSES
Receptors in the skin are responsible for providing the brain with at least four kinds of information about the environment:pressure, warmth,
cold, and pain.
Whereas other senses rely primarily on a single stimulus, pain results
from many different stimuli.
THE BODY SENSES
The sense of movement and body position is kinesthesis.
It cooperates with the vestibular and visual senses to maintain posture and balance.
The sensation of kinesthesis comes from receptors in and near the mus-
cles, tendons, and joints.