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Question
Open circulatory system is present in
(I) Arthropods
(II) Annelids
(III) Chordates
(IV) Molluscs
Open circulatory system is present in
(I) Arthropods
(II) Annelids
(III) Chordates
(IV) Molluscs
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Solution
The correct option is E I only
- The species in the phylum arthropoda have an open circulatory system. Open circulatory systems work by pumping the blood into a hemocoel.
- Molluscs have open circulatory systems like a snail, chiton, slug, etc, except for cephalopods which have closed circulatory systems.
- In Annelids the circulatory system is usually closed, i.e., confined within well-developed blood vessels.
- But in some polychaetes and leeches, the circulatory system is partly open, with blood and coelomic fluid mixing directly in the sinuses of the body cavity.
- Chordates also have a closed circulatory system, which can be either single or double looped. and most, but not all, chordates have a heart.
Thus, the correct answer is option E.
- The species in the phylum arthropoda have an open circulatory system. Open circulatory systems work by pumping the blood into a hemocoel.
- Molluscs have open circulatory systems like a snail, chiton, slug, etc, except for cephalopods which have closed circulatory systems.
- In Annelids the circulatory system is usually closed, i.e., confined within well-developed blood vessels.
- But in some polychaetes and leeches, the circulatory system is partly open, with blood and coelomic fluid mixing directly in the sinuses of the body cavity.
- Chordates also have a closed circulatory system, which can be either single or double looped. and most, but not all, chordates have a heart.
Thus, the correct answer is option E.
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