Multiple choice

In insects and molluscs, the blood flows freely throughout the body cavity through

  1. arteries and veins

  2. lacunae and sinuses

  3. arteries and pulmonary arteries

  4. veins and pulmonary veins

  5. lymph vessels
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This answer is correct. The blood does not remain confined to blood vessels, but it flows freely through the body cavity and channels called lacunae and sinuses in the tissues.

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