Assertion: lymphocyte | /r/HasProperty | parts of the immune system
Facets:
Source sentences:
text: Both lymphocytes and phagocytes are parts of the immune system.
text: Lymphocytes are a part of the immune system.
text: Lymphocytes constitute about 28–42 percent of the white cells of the blood, and they are part of the immune response to foreign substances in the body.