Monday, November 18, 2013

Apologia Anatomy & Physiology: Unit Two - Skeletal System As Helper & Protector

Apologia Anatomy & Physiology: Unit Two

How our Skeletal System helps protect us and support us!

As we continued through our study of the skeletal system, we completed two very simple projects that really illustrated some important jobs of our skeleton and bones!

First, we studied how the brain is protected by our skull! The skull is so interesting. An infant's skull is made to 'grow with them' and then fuse together when the head has completed it's growth. Inside the skull, our brain is surrounded by fluid, which allows it to be 'cushioned' and not get scrambled when we move around.

We illustrated this by taking an egg (the brain) and putting it inside a plastic container that was just a little bit bigger (the skull).

We then filled the container with water, put the lid on, and Melissa ran around the house with it, up and down stairs, and jumping all around. The egg was kept safe and perfect! It didn't suffer a scratch! (And as far as we know, it wasn't scrambled either!)  The egg 'floating' in water inside a container illustrates how the fluid inside our skull protects the brain.
We then drained the water out of the container, leaving the egg inside, and in a very vulnerable position. Melissa repeated all her previous movements, and then checked on the egg.....

Uh Oh!!! Scrambled egg with shells! Without the fluid to cushion it, the egg shattered. It is amazing how God designed us perfectly, allowing our body the ability to protect itself from harm.

We then explored just how important our bones are to our body by making a 'man' out of clay. The first attempt was 'just clay', and Melissa was disappointed that she could not seem to make a man that would be able to stand on his own.

After discussing how the main purpose of our skeleton is to support our frame, and give structure to our body, she then used toothpicks as bones and inserted them into our clay man. With this extra support, I am happy to say that he was actually able to stand up all on his own! (although he was a little top heavy!)

Don't you love his little toothpick smile?  :-)

Healthy bones play a vital role in our overall well being. It's been fun and interesting to learn about them.

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