Final answer:
Metastasis is the spread of cancer from its point of origin to other tissues in the body. It can occur through local spread, lymphatic system, or the bloodstream. The new cancers that form at distant sites are called metastases.
Step-by-step explanation:
Metastasis is the spread of cancer from its point of origin to other tissues in the body. It can occur through local spread, where cancer cells invade nearby tissues, or through the lymphatic system, where cancer cells spread to regional lymph nodes. The third way cancer cells can spread is through the bloodstream, leading to distant sites and the formation of new cancers called metastases.