This flashcard states that an open circulatory system is present in arthropods and molluscs, where blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses.
此闪卡指出，开放式循环系统存在于节肢动物和软体动物中，此时血液由心脏泵入大血管，再进入称为血窦的开放空间或体腔。
| Text | Open circulatory system is present in arthropods and molluscs in which blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses. |
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