Examlex
All of the following technologies were found in river valleys prior to 3000 B.C.E. except
Cancer Cells
Abnormal cells that divide uncontrollably and may invade nearby tissues or spread to other parts of the body.
Antigen
A foreign invader of the body, such as a bacterium or virus.
Foreign Invader
An external agent, often microscopic, that enters the body and can cause disease or trigger an immune response.
Lymphocyte
A type of white blood cell that plays a vital role in the immune system, helping the body fight infection and disease.
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