Final answer:
Angiogenesis is stimulated by factors that lead to cell proliferation, migration, and adhesion, and involves angioblasts deriving from hemangioblast precursor cells. Angiogenesis inhibitors are used in cancer treatment to prevent tumor growth by cutting off its blood supply.
Step-by-step explanation:
The formation of new blood vessels from existing vessels, known as angiogenesis, is a critical process in the growth and development of tissues. This biological phenomenon is stimulated by a variety of factors that contribute to cell proliferation, cell migration, and adhesion.
Blood vessels begin to form in the embryonic stage from mesoderm, where precursor cells called hemangioblasts differentiate into angioblasts and give rise to the vasculature. In adult life, angiogenesis continues to be important for wound healing and in the case of malignant tumors, which require a blood supply to grow. Angiogenesis inhibitors are therefore utilized in cancer treatment to prevent the growth of new blood vessels that the tumor needs, thus inhibiting its expansion.