Match the words with their definitions.
1) Immune system a colorless liquid containing white blood cells that cleans the tisssues of the body
2) Mucus a person who is receiving medical treatment, especially in a hospital
3) Membrane a covering mould
4) Bloodstream the reaction of the body to the presence of an antigen
5) Pandemic a thick liquid that is produced in parts of the body, such as nose
6) To retard a disease that spreads over a whole country
7) Estimate a thin layer of skin that connects or covers parts inside body
8) Stigma a injury to a part of your body, such as the muscle
9) Fungi common and wide-spread
10) Lymph tumor
11) To evolve to develop gradually
12) Malignancy feelings of disapproval that people have about particular illness
13) Strain judgment that you make without having the exact details
14) Prevalence to make the development or progress of the slower
15) Patient the blood flowing through the body