Question

Open type of vascular system is predominant in:

• A. Fishes
• B. Arthropods
• C. Amphibians
• D. Mammals

Answer 1

The correct option is B Arthropods

• The open circulatory system is present in arthropods and molluscs in which blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses.
• Chordates have a closed circulatory system in which the blood pumped by the heart is always circulated through a closed network of blood vessels. This type is considered to be more advantageous as the flow of fluid can be more precisely regulated.
  
• So, the correct answer is 'Arthropods'.