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velikii [3]
3 years ago
6

Most arthropods and some mollusks and tunicates have _____ circulatory systems, which means fluid transporting nutrients and oxy

gen flow directly into internal organs. a. closed b. nonexistent c. open
Biology
2 answers:
Gelneren [198K]3 years ago
4 0
Arthropoda and molluscs have open circulatory systems - meaning haemolymph (Their equivalent to blood) directly bathes the tissue, and isn't enclosed in blood vessels, as seen in a closed blood system, as in humans for example.
hodyreva [135]3 years ago
3 0

answer is (OPEN)

Explanation:

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