众所周知，使血管扩张的物质，如酒精，可以导致血管性头痛。
It is known that substances that dilate blood vessels, like alcohol, can cause vascular headaches.
近十年前的研究表明，许多动物事实上利用硫化氢来扩张血管。产生血流扩张的化学物质被称作血管扩张剂。
Research early this decade revealed that many animals actually use hydrogen sulfide to help expand blood vessels. Chemicals that create these expansions in blood flow are called vasodilators.
电损伤释放的局部物质引起血管扩张和增加小血管的通透性。
Local substances released by injury produce vasodilatation and increased small vessel permeability.
这种腺体在科摩·多龙的牙齿之间有开口，能释放出让血管扩张并且阻止血液凝固的的化学物质。
The gland has openings between the lizard's teeth and releases chemicals that both dilate blood vessels and prevent blood clotting.
海绵状血管畸形由窦状扩张的血窦组成，窦壁由内皮细胞，基膜物质和周细胞组成。
There were endothelial cells , basal membrane like materials and pericytes in the walls of these blood sinus.
海绵状血管畸形由窦状扩张的血窦组成，窦壁由内皮细胞，基膜物质和周细胞组成。
There were endothelial cells , basal membrane like materials and pericytes in the walls of these blood sinus.
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