Assertion: immune system's cell | /r/HasProperty | leukocyte
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: The cells of the immune system are the leukocytes or the white blood cells.
text: What researchers do know is that the body continuously makes immune cells that are called white blood cells, or leukocytes, and it generates far more cells of the adaptive system — known as lymphocytes — that mature into B cells and T cells than are needed.
text: The primary cells of the immune system are the leukocytes or white blood cells(WBC).
text: Immune cells are sometimes called white blood cells or leukocytes.