Multiple choice

In open vascular system the circulating fluid is called

  1. perilymph

  2. lymphatic fluid

  3. haemolymph

  4. blood

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In open circulatory systems (found in arthropods and mollusks), the circulating fluid is haemolymph. It directly bathes the organs and tissues, unlike blood in closed circulatory systems which is confined to vessels.