The Corpus Callosum. You can go to Neuroscience for Kids to find answers like that.

*Actually, the Corpus Callosum is the structure, but the type of tract is commisural.

Any research you do says exercise is the key to a healthy lifestyle. Check magazines, newspaper articles or dieting self-help guides. Research gives a wide variety of options and answers for anyone. A healthy diet also plays major key to this subject.

Corpus sanus -> healthy body

Well, there are various answers. You need to exercise. You need to eat healthy.

Everybody knows how to eat healthy but sometimes people don't. That means that the French don't all eat healthy but they don't not eat healthy either.