hemal system的用法和樣例：
例句
- The pancreatic vasculature is one of the very important yet most complicated components of the splanchnic vascular system of the upper abdomen.
胰腺的血管是上腹部內臟血管系統非常重要而又複雜的組成部分之一。 - The roach vascular system is much less extensive and lacks tiny capillaries, Kunkel notes, so pressure can be significantly lower.
康凱爾指出，蟑螂的血管系統規模小很多，也沒有微血管，所需要的血壓相對低得多。
