sentence: Monocytes are attracted to a damaged site by chemical substances, triggered by a range of stimuli.
sentences_before: When a monocyte enters damaged tissue through the wall of a blood vessel it changes to become a macrophage.
sentences_after: At some sites such as the testis, macrophages have been shown to populate the organ through proliferation.
concept_name: monocyte
headings: Macrophage Life cycle
categories: Cells Immunology