静脈

(1)a layer of ore between layers of rock

(2)岩の層の間の鉱床

(3)a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood"

(4)毛細血管から心臓へ血液を運ぶ血管

(1)all veins except the pulmonary vein carry unaerated blood

(2)肺静脈を除くすべての静脈は酸素供給されていない血液を運ぶ