the autonomic nervous system, which controls vital functions such as breathing, digestion, heart rate, and secretion of hormones. Skull The purpose of the bony skull is to protect the brain from injury. The skull is formed from 8 bones that fuse together along suture lines. These bones include the
Density is a measurement of how solid something is. Specifically it is the mass per unit volume of a substance. If you have two objects of the exact same size (volume), the more dense object will weigh more than the less dense object. So there are two things contributing to density:
Density is mass per unit volume of a substance. The Mass and volume of water is in the ratio of 1:1 .There fore the density of water is 1. With rise and decrease of temperatu â¦ re the volume increases or decreases to change the water density.he formula for density is. Density = mass/volume. So something that is very heavy but doesn't take up much space is considered to have a high density (like lead), but something that is light and takes up a lot of space has a low density (like feathers).