the xyphoid process
http://en.wikipedia.org/wiki/Xiphoid_process
a strong kick with the ball of the foot to the xyphoid process will take down even the most determined attacker.
The small piece of cartilage at the bottom of the sternum is called the xiphoid process. It is a small extension of the lower part of the sternum that is flexible in youth but tends to ossify with age.
basement
1. triangular prism it has 2 triangular faces. 2.triangular base pyramid, it has 5 triangular faces. 3. square base pyramid, it has 4 triangular faces.
a triangular based pyramid
Tetrahedron
All except the base are always triangles; the shape of the base gives the name to the pyramid; eg a pentagonal pyramid has a pentagon as the base and five triangular faces; a triangular pyramid has three triangular faces and also has a triangle for the base.
A triangular prism is so called because the shape of the ends is a triangle. A triangular pyramid is so called because the shape of the base is a triangle.
A shape with a square base and four triangular sides is a pyramid.
4 vertices. 3 on the triangular base that gives the shape its name and 1 vertex for the top point.
you look at the base so that will be the first name andd the figures beside the base will be either a prism(rectanular) or a pyramid(triangular), you find out which one is that, and then that's the second name(ex; its shaped triangular, and the base is a hexagon then the three-dimensional figure will be called a hexagon pyramid...
pentagonal pyramid
The breast bone is also called the sternum in scientific communities. It is made of three parts, the manubrium (top), the gladeolus, and the zyphoid.SternumThe medical term for the breast bone is...the Sternum.