- Women's measurements
- Big Mac
- Brain membranes
- Nina, Pinta, and the Santa Maria
- The Number Three in American Culture
- Three Furies
- Pythagoras - three is the perfect number
- Trinity symbol
- How many triangles?
- id, ego, superego
- Threes.com featured on the BBC2
- Simon Cowell: You Never Want The People That You Work With To Do Well
- Third Eye - Pineal Gland
- Three Foil Cross
- Empirical rule - The 68-95-99.7 Rule
- Three Baskets
- Three Wise Monkeys
- Bible threes
The brain and medulla spinalis are enclosed within three membranes. These are named from without inward: the dura mater, the arachnoid, and the pia mater.
The dura mater is a thick and dense inelastic membrane. The portion which encloses the brain differs in several essential particulars from that which surrounds the medulla spinalis, and therefore it is necessary to describe them separately; but at the same time it must be distinctly understood that the two form one complete membrane, and are continuous with each other at the foramen magnum.
In all things there are three choices: Yes, No & no choice, except in this -- I either choose the truth or I am deceit.
|If you have a broadband connection and are using the web browser Internet Explorer, you can view a sabbatical presentation by the author of The Book of Threes. He suggests threes exist simultaneously as simplification, completion and memory. Read more at http://sab.threes.com.|