Assertion : Open circulatory system is found in most arthropods.
Reason : Arthropods contain haemolymph which directly bathers internal tissues and organ.

Assertion : In mollusca, circulatory system is of closed type Reason : The blood of mollusca contains haemoglobin

Open circulatory system is present in Arthropods (Insects) Annelids Chordates Molluscs

Open circulatory system is present in : (A) Arthropods (B) Annelids (C) Chordates (D) Molluscs

Assertion : The open circulatory system is more efficient than the closed circulatory system. Reason : The blood flows far more rapidly in open circulatory system than in the closed one.

Assertion : Closed circulatory system is less efficient than open circulatory system Reason : The blood flow is slow is closed circulatory system than in open circulatory system.

Assertion : Closed circulatory system is less efficient than open circulatory system Reason : The blood flow is slow is closed circulatory system than in open circulatory system.

Assertion : The open circulatory system is more efficient than the closed circulatory system. Reasoning : The blood flows far more rapidly in open circulatory system than in the closed one.