Which best describes cancer cells? Cancer cells cannot enter the circulatory system. Cancer cells grow controllably. Cancer cells attach to organs. Cancer cells lose nutrients to healthy cells.

Correct option is cancer cells attach to the organs . 

Explanation: Cancer cells grow and divide at an abnormally rapid rate, are poorly differentiated, and have abnormal membranes, cytoskeletal proteins, and morphology. The abnormality in cells can be progressive with a slow transition from normal cells to benign tumors to malignant tumors thus leading to a cancerous tissue. 

Cancer cells can go into small blood vessels and then get into the bloodstream. They are called circulating tumour cells (or CTCs).

Researchers are looking at using circulating tumour cells to diagnose cancer instead of a tissue sample . The place where a cancer starts in the body is called the primary cancer or primary site. Cells from the primary site may break away and spread to other parts of the body. These cells can then grow and form other tumours. These are called secondary cancers or metastases.