It’s Not Just Water Weight

Here’s our fun fact of the day: Blood makes up around 7% of the weight of a human body.

All Hands on Deck!

Happy Friday! Since there are so many fun facts about hands, we’ve decided to compile them all into one big interesting post! Read and Enjoy.

Here’s one you might have already experienced: Fingernails grow nearly 4 times faster than toenails!

But did you know that the pink under your fingernails is the blood in your capillaries? You did?

Okay how about this: There are no muscles inside the fingers. The muscles which bend the finger joints are located in the palm and up in the mid forearm, and are connected to the finger bones by tendons, which pull on and move the fingers like the strings of a marionette.

Here’s food for thought: About a quarter of the motor cortex in the human brain (the part of the brain which controls all movement in the body) is devoted to the muscles of the hands.

Last but not least, did you know that the wrinkles on the back of the finger knuckles are actually dimples? They mark areas where the skin is attached to the tendon beneath the skin.

Now you’ll know the back of your hand a little better than you did before!

Here’s a Strange Thought

Ever thought of how many miles our nervous system would be if we were to line them up from end to end?

Here’s our Fun Fact of the Day: The human body has 45 miles of nerves.

Forty-three pairs of nerves connect the central nervous system to every part of the body. Twelve pairs go to and from the brain, and 31 go from the spinal cord.

September 29, 2012 Deal of the Day: 3D Skeleton magnets

Get your classroom ready for Halloween with today’s spooky Deal of the Day! From now until midnight tonight PST you can get our 3-D Skeleton Demonstration Magnets for only $24.99 (down from $49.99—that’s a 50% savings)!

Build magnetic science models on your whiteboard that are large enough for the whole class to see! Assemble the models in whole–class demonstrations, then let students try it later to test their knowledge. This set includes 15 magnetic textured pieces detailing the major bones  as well as an activity guide with a blackline master of the human body. Engage children in hands-on discovery and give them the opportunity to manipulate 3D magnetic pieces that feel like real bones!

Get your 3D magnetic skeleton set here: http://www.educationalinsights.com/product/3–45-d+skeleton+demonstration+magnets.do. Promo code EIFREE will get you free shipping too! It’s scary how much you can save with EI!