We decided to learn about hearing. Mr. Kintobotnik flies the SCAS up to Jessie's eardrum.
"Let's start off with the eardrum.” he taught, “The eardrum vibrates whenever it detects sound."
We watch it vibrate. Apparently, the sound being heard is the SCAS's engine. I never thought it was that loud. Then again, the SCAS is right next to her eardrum.
Mr. Kintobotnik flies the SCAS passed the eardrum, and we see tiny bones attached to the eardrum. As it vibrates, the bones move back and forth.
"As you can see,” Mr. Kintobotnik taught, “the ear bones move as the eardrum vibrates. While they move, they hit the membrane wall of the cochlea."
Mr. Kintobotnik shrinks the SCAS some more, flies towards the cochlea's membrane wall, and moves past the cells that build up the wall. Eventually, we make it in the cochlea, and it's filled with some kind of liquid. Mr. Kintobotnik" resizes the SCAS back to the size of a flu virus.
"This is the inside of the cochlea, class!” he continued. “This is where the last step of hearing happens!"
He pilots the SCAS to some nerves in the cochlea. They seem to act up a bit."
"'The liquid in the cochlea rubs against these hearing nerves,” he continued. "'The nerves detect the sound and send it to the brain. That's how hearing works, class!"
The class became filled with awe after learning about hearing. Eventually...
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