AdministratorWhat type of respiratory system does a flatworm have?
Flatworms have no specialized respiratory system; gases simply diffuse across the body wall.
Do flatworms have a respiratory system with lungs?
There is no need for a special circulatory system as a human has because the flatworm doesn’t breathe with lungs and doesn’t need to transport oxygen around its body. The flatworm simply diffuses oxygen via its skin. This occurs wherever it may need the oxygen.
Do flatworms lack a respiratory system?
Flatworms lack a respiratory or circulatory system; these functions take place by absorption through the body wall. Nonparasitic forms have a simple, incomplete gut; even this is lacking in many parasitic species. Movement in some flatworms is controlled by longitudinal, circular, and oblique layers of muscle.
Why do flatworms have no respiratory system?
Flatworms do not have a respiratory system. Instead, they have pores that allow oxygen to enter through their body. Oxygen enters the pores by diffusion. There are no blood vessels in the flatworms.
How do flatworms breathe?
Flatworms are small, literally flat worms, which ‘breathe’ through diffusion across the outer membrane (Figure 20.3). The flat shape of these organisms increases the surface area for diffusion, ensuring that each cell within the body is close to the outer membrane surface and has access to oxygen.
What type of circulatory system do flatworms have?
no circulatory system
Flatworms have no circulatory system. Animals without a circulatory system have limited abilities to deliver oxygen and nutrients to their body cells because of the way that molecules behave.
Do roundworms have respiratory system?
Roundworms have no circulatory or respiratory systems so they use diffusion to breathe and for circulation of substances around their body.
How are respiration and circulation accomplished in flatworms?
Terms in this set (12) Describe how respiration, circulation, and excretion are accomplished in the flatworm. many flame cells are joined together to form a network of tubes that empties into the outside environment through tiny pores in the animal’s cells.
How do flatworms obtain oxygen?
Flatworms are small, literally flat worms, which ‘breathe’ through diffusion across the outer membrane. The flat shape of these organisms increases the surface area for diffusion, ensuring that each cell within the body is close to the outer membrane surface and has access to oxygen.
How do roundworms and flatworms respire?
Instead, roundworms (also known as nematodes) obtain the oxygen their bodies need through diffusion, a process of gas exchange commonly used among flatworms and earthworms as well. Diffusion allows roundworms to provide oxygen to their cells without the use of complex organs, such as lungs.
In which of the following phylum respiratory system is absent?
The phylum that lacks a respiratory and a circulatory system is phylum Arthropoda. Explanation: The phylum arthropoda is a ‘group of organisms’ that contains an exoskeleton; they are in vertebrate animals that majorly consists of the crustaceans. They are said to have a well segmented body.
Do flatworms have a respiratory system?
Flatworms have no specialized respiratory system; gases simply diffuse across the body wall. The main ganglia, or nerve centres, of the nervous system and the major sense organs are generally concentrated at the anterior end.
Is the body of a flatworm segmented?
The body is not segmented; spongy connective tissue (mesenchyme) constitutes the so-called parenchyma and fills the space between organs. Flatworms are generally hermaphroditic—functional reproductive organs of both sexes occurring in one individual.
Are flatworms free-living or parasitic?
A number of flatworm species are free-living, but about 80 percent of all flatworms are parasitic—i.e., living on or in another organism and securing nourishment from it.
What are some examples of flatworms?
Examples of flatworms 1 Tapeworm: intestinal parasite of vertebrates 2 Notoplana acticola 3 Plan 4 Staves 5 Cercaria 6 Taenia solium More