### substance | contaminant:

Airborne contaminant
* can reach inside cracks on walls, too.
* cause diseases such as influenza, hepatitis, tuberculosis and pneumonia.

Biological contaminant
* are capable of causing health problems for anyone
  - or are produced by living things
* can come from both outside and inside the home
  - crosscommunicate infectious agents from one person to another
* originate from living things or are themselves living things.
* require moisture in order to thrive and remain potent.

Chemical contaminant
* Most chemical contaminants concentrate in the fatty tissues of fish over time.
* are more difficult to eliminate.
* can harm the health of humans and wildlife.
* continue to cause problems to marine life.
* imply human health risks.

Inorganic contaminant
* are a wide-spread problem that jeopardize environmental quality.
* can damage the nervous and circulatory systems and other organs.

Organic contaminant
* Some organic contaminants can transfer across.
* have chains of carbon atoms as their basic building blocks.
* require increased concentration.

Radioactive contaminant
* occur naturally.
* round out the list with such elements as radium and uranium.

Toxic contaminant
* Some toxic contaminants act as allergens
  - attach onto particles and are carried with the sediments by water currents
* can persist in bay sediments for decades.

### substance | corpuscle:

Basophil
* Some basophils contain a few purple granules
  - have few granules, which probably is the result of degranulation in the sample
* also migrate into the tissues
  - participate in allergic responses
* are a specific type of white blood cell
  - active participants in hypersensitivity reactions
  - functionally similar to mast cells but appear to have a different cell lineage
  - granulocytes stained by basic dyes such as toluidine blue, carrying IgE receptors
  - inflammatory mediators of substances such as histamine
  - leucocytes which play an important role in the anaphylactic reaction
  - leukocytes
* are one of the body's tools for helping to fight infection
  - type of granulocyte
  - present in blood
  - rare granulocytes
* are rare in blood of healthy cats
  - dogs
  - responsible for the symptoms of allergy
  - similar to eosinophils but are present in much smaller quantities
* are the circulating counterpart of tissue mast cells
  - precursors for mast cells
  - rarest type of leukocytes, and their granules stain blue
  - same size as eosinophils, but have purplish to blue-black granules
  - smallest circulating granulocytes with relatively the least known function
  - weakly phagocytic and sluggishly motile
* carry heparin and histamines and have large blue granules
  - histamine and heparin , and other protein chemicals
* contain heparin, histamine and serotinin
  - metachromatically staining cytoplasmic granules
* induce inflammation.
* leave the blood and develop into mast cells.
* stain blue, prolactin is an acidophil.
+ White blood cell, Types of white blood cells, Granulocytes, Basophils: Cell biology :: Immunology :: Blood cells
  * Basophils are rare granulocytes. If you had 1000 white blood cells, only 1 to 3 of them would be Basophils. Theit nucleus is hidden by granules which turn dark blue in color when stained. Basophils carry histamine and heparin, and other protein chemicals. They appear at the sites of ectoparasite infection, or allergies. We don't know exactly how they work.