The fluid consisting of plasma, blood cells, and platelets that is circulated by the heart through the vertebrate vascular system, carrying oxygen and nutrients to and waste materials away from all body tissues.

• 血液由血浆、血细胞和血小板组成的液体，由心脏驱动在脊椎动物的血管系统里循环，血液可将氧气和营养物质输送到全身的细胞组织中，并排放无用物质