noun
closed vascular system; closed blood-vascular system
Biological term referring to a circulatory system where blood is confined to vessels, as in vertebrates and some invertebrates.
脊椎動物は閉鎖血管系を持つ。
Vertebrates have a closed vascular system.
閉鎖血管系では血液
In a closed vascular system, blood flows inside blood vessels.