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Junior Cert: The Senses and Nervous System

How do nerves work? Youtube. 5 minutes 4 Star
Why do we have pain? Youtube. 10 minutes from SciShow 4 Star
Louis volunteers his cheek for Science MyYoutube. 1 minute  
The TENS machine Youtube. 1 minute 4 Star
How to Control Someone Else's Arm with Your Brain link Youtube. 5 minutes  
A neuroscientist shows how brains receive and deliver electric impulses - and how legs can respond. By dissecting a cockroach (live on stage) 6 mins. TED.com 5 Star
How does your brain respond to pain? Youtube via TED-Ed. 5 minutes 3 Star
The Eye      
Interactive Drag and Drop on labelling the eye Nice activity from freezay.com 4 Star
more detailed look at it the different parts here. Text based 3 Star
Video of eye dissection Really nice video of a dissection of a cow's eye. 4 Star
Laser eye surgery to change the shape of a lens Youtube. 3 minutes 3 Star
How Moken children see with amazing clarity underwater They close their iris. YouTube 2 mins 5 Star
How could an eye possibly evolve from a simpler organ? YouTube 5 mins via TED-Ed 4 Star
What do images look like to somebody who is colour-blind? Not scientific, but useful nevertheless 4 Star
The hole-in-your-hand trick Also details the role of your brain in the process. Youtube. 3 minutes 4 Star
The boy who sees without eyes Just to show there is still a heck of a lot we still don't know. Youtube. 10 minutes 4 Star
Actually you have many, many more senses than just 5. Read more here From MrReid.org - a blog post 4 Star