Which of following systems is segmentally arranged in annelids?
Correct answer: A. Excretory system
- A. Excretory system
- B. Digestive system
- C. Circulatory system
- D. Nervous system
Explanation
Option C: Annelids have a closed circulatory system, which means the blood circulates through a closed network of blood vessels. In some cases, such as with polychaete worms, the blood is pumped directly through self-contracting blood vessels. In other cases, blood is carried throughout the body from a central pumping organ, like the human heart. Moreover, the circulatory system is segmentally arranged throughout the segmented annelid. Option A: As explained this is an incorrect option. Option B: As explained this is an incorrect option. Option D: As explained above this is an incorrect option.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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