Table of Contents
- 1 How are annelids more advanced than platyhelminthes?
- 2 How are annelids more complex than roundworms?
- 3 What distinguishes annelids from platyhelminthes?
- 4 How are flatworms more complex than cnidarians?
- 5 What is the main difference between platyhelminthes and Nematoda?
- 6 How do annelid animals differ from arthropods?
- 7 What is the main difference between Platyhelminthes and nematoda?
- 8 What makes an annelid different from a flatworm?
- 9 What kind of body cavity does a nematode have?
- 10 Which is more complex a roundworm or a flatworm?
How are annelids more advanced than platyhelminthes?
Annelids are distinguished by ring-like external bands along their muscular body wall that coincide with internal partitions dividing their bodies into segments. With a circulatory system to distribute blood and oxygen and a one-way gut, their bodies are enormously more complex than modern flatworms.
How are annelids more complex than roundworms?
Body Structure – Annelids are worms with the most complex body plan while roundworms have a medium complex body. Furthermore, annelids have a complete circulatory system with a heart, blood vessels, and blood while roundworms do not have a circulatory system and the nutrients move through diffusion.
How do annelids differ from nematodes?
Nematodes have an unsegmented body whereas annelids are metamerically segmented. Nematodes are pseudocoelomate, whereas annelids have a true coelom. Nematodes are dioecious, i.e. sexes are separate. Annelids are mostly hermaphrodites and free-living.
What distinguishes annelids from platyhelminthes?
What distinguishes Annelids from Platyhelminthes? Annelids are coelomate while Platyhelminthes are acoelomate. Annelids are also segmented. Annelids are coelomate and segmented.
How are flatworms more complex than cnidarians?
Flatworms are more complex than cnidarians. Cnidarians have two layers of cells, the ectoderm and the endoderm; flatworms have a middle layer called the mesoderm between the other two layers (Fig. 3.16). The cells of the ectoderm and endoderm are also more organized than similar cells of cnidarians.
What is the main difference between platyhelminthes and nematoda?
The main difference between Platyhelminthes and Nematoda is that Platyhelminthes consists of flatworms with a thin, dorso-ventrally flattened body whereas Nematoda consists of a cylindrical body, which is tapered to fine ends at each end.
What is the main difference between platyhelminthes and Nematoda?
How do annelid animals differ from arthropods?
Hint: Annelids are the animals that are referred to as segmented worms, while arthropods are referred to as animals with jointed legs. An example of annelids is the earthworm and an example of arthropods is the Housefly. The organisms show the presence of Annulus (rings or segments) all over the body.
How are nematodes more complex than Platyhelminthes?
Species of nematodes are higher than that of Platyhelminthes. Platyhelminthes have an incomplete gut whereas nematodes have a complete one. Unlike in nematodes, Platyhelminthes have flame cells to do the excretory functions. Unlike flatworms, most roundworms are microscopic.
What is the main difference between Platyhelminthes and nematoda?
What makes an annelid different from a flatworm?
Annelids are distinguished by ring-like external bands along their muscular body wall that coincide with internal partitions dividing their bodies into segments. With a circulatory system to distribute blood and oxygen and a one-way gut, their bodies are enormously more complex than modern flatworms.
What are the main differences between Platyhelminthes and nematodes?
The first main difference is one of the big taxonomic differences: Platyhelminthes are also known as “flatworms,” while nematodes (Nematoda) are a kind of “roundworm.”. Both are only a few layers of tissue thick and have simple digestive arrangements, but the overall body plan, round vs.
What kind of body cavity does a nematode have?
The body cavity of nematodes is a pseudocoelom, which is lined with mesodermal and endodermal cell layers. The parasitic species have especially developed some nerve bristles to sense the environment around them. What are Annelids? Annelids are a large phylum consisting of segmented worms, ragworms, earthworms, and nuisance leeches.
Which is more complex a roundworm or a flatworm?
Flatworms (phylum Platyhelminthes) are simple animals that are slightly more complex than a cnidarian. Roundworms (phylum Nematoda) have a slightly more complex body plan. Segmented worms (phylum Annelida) are the most complex animals with worm-like body plans.