Yet any whole organ would be a complex three-dimensional edifice comprising specialized cells, nerves and muscle, all interwoven with a dense web of veins and capillaries diffusing oxygen and nutrients.

• 然而任何完整的器官都是由特化的细胞、经和肌肉所组成的复杂三维结构，并有浓密的血管和微血管网络交织其间，用以扩散氧气和养份。