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 has no value to the human body and is best thought of as poison. The effects of mercury exposure vary depending on the form and level of exposure. Acute exposure to mercury vapor can produce serious effects on the nervous system including psychotic reactions, hallucinations, suicidal tendencies and delirium.