Multiple choice

Cockroach and other insects possess an

  1. Open type vascular system

  2. Closed type vascular system

  3. No vascular system

  4. Both (A) and (B)

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

Insects, including cockroaches, have an open circulatory system where hemolymph (insect blood) flows freely through body cavities (hemocoels) rather than being confined to blood vessels. Closed circulatory systems are found in vertebrates like humans and earthworms.