Nematodes are…

✅Explanation:
Nematodes are classified as pseudocoelomates. This means they possess a body cavity called a pseudocoelom, which is a fluid-filled space between the body wall and the digestive tract. Unlike a true coelom (found in animals like earthworms), a pseudocoelom is not completely lined with mesodermal tissue. In the image, you can see the pseudocoelom (labeled "pc") as the clear space surrounding the digestive tract. The body wall is labeled "bw," and the mesoderm-derived muscles are visible.

🔑Key Points:
(a) Coelomatic: Coelomates have a true coelom, fully lined with mesoderm.