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 a metal found in the environment, including in the water, air and soil. You can be exposed to mercury by breathing the vapors, through skin contact or by eating foods contaminated with mercury. Because the nervous system is highly sensitive to mercury, large amounts of mercury can damage the brain and kidneys. If you are pregnant, mercury can affect the developing fetus.