one major difference between flatworms and roundworms is that

Roundworms are more cylindrical in shape and tapered to a fine point at one end. Similarly, roundworms have a rigid outer covering called a cuticle that they shed repeatedly throughout their lives and as they grow. Flatworms do not have this; their bodies, instead, are covered with cilia, hairlike growths.

1. What's the difference between platyhelminthes and nematodes?
2. What's the difference between free-living flatworms and parasitic flatworms?
3. What organ systems do flatworms lack?
4. Do nematodes Coelom?
5. Are flatworms dangerous?
6. What diseases do flatworms cause?
7. What are 2 parasitic flatworms?
8. Can flatworms live in humans?
9. How do flatworms defend themselves?
10. What is the importance of flatworms?

What's the difference between platyhelminthes and nematodes?

Platyhelminthes and Nematoda are two invertebrate animal phyla. Platyhelminthes consists of flatworms whereas Nematoda consists of roundworms. The main difference between Platyhelminthes and Nematoda is the anatomical structure of the body of each invertebrate.

What's the difference between free-living flatworms and parasitic flatworms?

The free-living species of flatworms are predators or scavengers. Parasitic forms feed on the tissues of their hosts. Most flatworms, such as the planarian shown in Figure 1, have a gastrovascular cavity rather than a complete digestive system.

What organ systems do flatworms lack?

They are bilaterally symmetrical (i.e., the right and left sides are similar) and lack specialized respiratory, skeletal, and circulatory systems; no body cavity (coelom) is present. The body is not segmented; spongy connective tissue (mesenchyme) constitutes the so-called parenchyma and fills the space between organs.

Do nematodes Coelom?

Although nematodes do have a space in the body between the digestive tract and the body wall, it is not lined with tissue and is not considered to be a true coelom. Thus, nematodes are sometimes referred to as pseudocoelomates (Fig. 3.17 C).

Are flatworms dangerous?

While New Guinea flatworms pose a potential health threat, they are no more dangerous than the native species of invertebrates that can carry the rat lungworm parasite. Humans are unlikely to be affected by the rat lungworm parasite since transmission of the parasite can only occur through ingestion.

What diseases do flatworms cause?

Paragonimiasis is caused by infection with a flatworm. That's a parasitic worm also called a fluke or lung fluke because it commonly infects the lungs. Usually, infection comes after eating undercooked crab or crayfish that carry immature flukes. Once swallowed by a person, the worms mature and grow inside the body.

What are 2 parasitic flatworms?

Several types of flatworms are parasitic to humans, fish, livestock, and other organisms. But, the two most widely studied parasitic species are tapeworms and blood flukes. According to the host organism, they are further classified into different types.

Can flatworms live in humans?

There are a variety of parasitic worms that can take up residence in humans. Among them are flatworms, thorny-headed worms, and roundworms. The risk of parasitic infection is higher in rural or developing regions. The risk is great in places where food and drinking water may be contaminated and sanitation is poor.

How do flatworms defend themselves?

Parasitic Adaptations

Parasitic flatworms protect themselves from the hosts' digestive liquids by developing teguments or coverings around their bodies.

What is the importance of flatworms?

Through their large surface compared to their volume they can exchange gases like carbon dioxide, oxygen and ammonia across bodies. Flatworms can adapt to many conditions, which makes them able to adapt to an enormous variety of habitats. They play important roles for healthy streams, ponds, and lakes.