For estimating the exposure to man there are two models;

  * [[:merlin-expo:models:human intake|Human intake]] will assemble the total exposure to one person (concentration inhaled and total quantity ingested) from different sources (internal and external to the investigated area). 

  * [[:merlin-expo:models:man|Man]] will calculate the final concentrations in organs of a human body using the concentration/quantity) of the human intake model as input. 

For cases where a group or population of people with different consumption habits, ages etc. are studied, the [[:merlin-expo:models:population intake]] and [[:merlin-expo:models:population]] models should be used. These are identical to their one-person counterparts but allow some data to be different for different individuals. When working with a group/population, the user should add individuals in the **People** tab of the [[context screen]].