Hirudin present in these annelids dissolve the blood clots, so it would play an essential role after surgeries Question 4: Why do Annelids exhibit triploblastic nature? Answer: They would possess the three germ layers, so the annelids would be consists of triploblastic. Question 5: What causes mobility in annelids? Answer: Setae would help in mobility by Certain body muscles to extend a segment's setae to stop the segment from moving backward when the longitudinal muscles contract. Annelids are soft-bodied, bilaterally symmetrical invertebrates with ring-like segments. They include earthworms, leeches, and polychaetes, and have adapted to live in various habitats. Learn about their body plan, organ systems, and diversity. Phylum Annelida (L., annelus = little ring or F., anneler = to arrange in rings) is a group of bilaterally symmetrical, coelomate, and segmented animals known commonly as segmented worms. Members of this phylum exhibit a body divided into repeated segments called metameres, which give them structural and functional division. Annelids are triploblastic and possess a true coelom, which is divided by septa, and a closed circulatory system. They have a complete digestive system, a well-developed ... Master Annelida -explore segmentation, classes, examples & quizzes. Ace your biology exam with Vedantu!
