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Tell me where it hurts. I am singing, not hurting. Ahm... I do love the drums. I am drumming in honour of today's quest to the ear, to see... how we hear. So, you're playing the drum, because, we're going to learn how the drum in your ear helps you hear! That was the plan, but, having managed to climb up this tree, you found that the getting down part is not so easy. Precisely. No worries, as the ear is coming to hear. Delightful. Before we enter, did you know that there are 3 parts to the ear? 3 parts? Sing it Nurb! The outer ear, the middle ear and the inner ear. Woo...hoo...hoo... I am guessing that this being on the outside would be the outer ear! What a clever Chloe, you are! The outer ear also known as the Pinna or Auricle, fancy word... The Pinna or the outer ear acts like a funnel collecting sounds to channel them into the ear canal which is also a part of the outer ear. What are we waiting for? Let's head inside the outer ear. Ooh, what's this guck on the floor? You mean this glorious earwax produced by the ear canal? Nasty earwax is more like it. Hardly... Earwax contains chemicals to fight off infections that could hurt the skin in the ear canal. And traps dirt to help keep it clean. Okay. Fighting infection and keeping ear canal clean is important stuff. Ohh...yeah. Also, earwax will help us slide down the ear canal. Woo...hoo...hoo... To the middle ear... where we find the ear drum. Quietly, my dear Chloe! The eardrum is a very sensitive instrument. Ahh... Much better... Like my bongo drum, the ear drum is a thin piece of tightly stretched skin. So they work the same? Very much the same! And, also different! Such a Nurb thing to say! Explain! A musical drum makes sound when we hit it. But, no one's hitting the drum in your ear! The sound waves that your outer ear collected, cause it to vibrate. Sound waves vibrate the eardrum, got it! what happens next? When the eardrum vibrates, it moves a set of three tiny bones on the other side, called Ossicles. Ossicles, that sounds like a drumbeat. Ossicles...Ossicles...Ossicles. The three ossicle bones are called the Hammer, the Anvil, and the Stirrup. Those bones sort of look like those things. But, the sound's journey to the brain isn't over yet, is it? Not even close. For that we have to pop pass the eardrum through the inner ear. There are the ossicles. And, there's the Cochlea. The Ossicle bones are connected to the Cochlea! The cochlea is a small cruel tool filled with a liquid. The vibration of the ossicles create waves in the liquid in the cochlea. Are those little hairs that I see? I am so happy you asked. The cochlea is lines with tiny hairs. When the fluid inn the cochlea moves, it moves the hairs, and creates nerve signals that get sent to the brain. The brain understands these brain signals as sound. And so, you hear! What? I said, you hear! Sorry, I can't hear you. Not because you have earplugs in your ears! A precaution in case you started singing again. Ho...ho... What a fine idea! 3 parts... to little ear, you will need if you want to hear! Outer, Middle, and Inner Ear! Scoop...doob....dooboo... Sound gets funneled in the Pinna, through the earcanal to the middle ear where the sound makes the eardrum vibrate... moving the ossicles, ossicles, ossicles, ossicles. Ossicles move the liquid in the cochlea in the inner ear which move the tiny hairs inside the cochlea, sending nerve signals to your brain. So, you can hear! Skiddly...doob...doob...doob...doob....doob... I hear you!

Video Details

Duration: 5 minutes and 9 seconds
Language: English
License: Dotsub - Standard License
Genre: None
Views: 41
Posted by: pgtranscribes on Apr 13, 2015


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