This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Metastasis illustration. This illustration titled How Cancer Spreads explains the process of metastasis Once metastatic cells are attached to the basement membrane physical barrier that seperates tissue components they break through with the help of an enzyme called type IV collagenase Cancer cells then move through the blood stream