Multiple choice

Which of the following animals has the blood anti-coagulant in the alimentary system?

  1. Neries

  2. Leech

  3. Snake

  4. Octopus

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

Leeches produce hirudin, an anti-coagulant, in their saliva to prevent the host's blood from clotting while they feed.