(d)++Blood

Leucocytes can be divided into 2 groups: Phacocytes and Lymphocytes

 * Phagocytes (70%):
 * Phagocytosis of antigens
 * Phagocytes simply eat any cell which is not recognized as 'body own' cell
 * Non-specific defense


 * Lymphocytes (30%):
 * Recognize a particular kind of antigen and produce antibodies that work against that kind of antigen
 * Can be divided many times and form a clone that produce the same kind of antibody
 * Specific defense

12. What are the two main functions of blood? List the substances that are transported.
The two main functions of blood are:
 * 1) To transport substances (shown below) throughout the body
 * 2) To defend the body against infections and other foreign substances

Substances transported by the blood: Simple Cartoon Version: media type="youtube" key="0RkAQgL3qnk" height="315" width="420"
 * Nutrients (e.g. glucose)
 * Oxygen
 * Carbon Dioxide
 * Hormones (e.g. insulin)
 * Antibodies
 * Waste Products (e.g. urea)
 * Heat

More Complex and Detailed Version: media type="youtube" key="R-sKZWqsUpw" height="315" width="560" align="center"