Practice question

MCQ

Question

Which phylum includes animals with an open circulatory system?

Options

Choose one · Correct answer highlighted

Annelida Chordata Arthropoda Correct Echinodermata

Explanation

Arthropods have an open circulatory system where the blood directly bathes organs in a hemocoel. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

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Practice question

Which phylum includes animals with an open circulatory system?

Options

Explanation

Comments

Related blogs

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