SENSORY ORGANS ANATOMY. 1  Sensory organs are very highly developed and specialized organs that are an extension of the central nervous system, with a sole function to take in information and relate it to the brain. The sensory neurons are highly adapted to detect changes of both external and internal changes in the environment and report these changes to the brain.
If you break a mercury thermometer or light bulb, a small amount of liquid mercury may spill out. Liquid mercury can separate into small beads, which can roll some distance away. The mercury may also evaporate into vapour. However, this small amount of mercury is extremely unlikely to cause problems for your health.
Mercury is the 80th element on the periodic table and is represented by the chemical symbol Hg. It is a metal, but remains in liquid form at room temperature. Mercury is a very toxic substance and accumulates in the body.It causes damage to the brain, kidney and lungs and even small doses can cause mercury poisoning. Despite the danger of this element, mercury still has many important uses.t is a metal, but remains in liquid form at room temperature. Mercury is a very toxic substance and accumulates in the body. It causes damage to the brain, kidney and lungs and even small doses can cause mercury poisoning.