Flatworms: These include tapeworms, which are parasites (meaning they live on a host organism), and planaria, which live in ponds and lakes. These animals are so flat they don’t even need blood. They absorb oxygen through their skin and it spreads directly to every cell in their body.
- 1 Do flatworms have blood?
- 2 Are flat worms Cephalized?
- 3 How are flatworms able to survive without a circulatory system while humans can t?
- 4 What cells do flatworms have?
- 5 How does gaseous exchange occur in flatworms?
- 6 Do flatworms have a complete digestive system?
- 7 Do flatworms have appendages?
- 8 Do flatworms have circulatory system?
- 9 Do Platyhelminthes have jointed appendages?
- 10 Are sponges cephalized?
- 11 Are flatworms segmented?
- 12 Are roundworms Monoecious or dioecious?
- 13 Are chordates cephalized?
- 14 Are flatworms heterotrophic or autotrophic?
- 15 What characteristics do flatworms have?
- 16 Do roundworms have appendages?
- 17 Do flatworms have circular muscles?
- 18 What are the organs for gas exchange in flatworms?
- 19 Do Mollusca have appendages?
- 20 Where does the exchange of gases occur in birds?
- 21 Where does exchange of gases take place?
- 22 Does the planarian have a complete or incomplete digestive system?
- 23 Why does flatworms have no digestive system?
- 24 Which phyla has incomplete digestion?
- 25 Do flatworms have a coelom?
- 26 How are respiration and circulation accomplished in flatworms?
- 27 Do Cnidaria have appendages?
- 28 Do annelids have appendages?
- 29 Do sponges have appendages?
- 30 Do flatworms have a central nervous system?
- 31 What are jointed appendages?
- 32 Are sponges Heterotrophs?
- 33 Are sponges aquatic?
- 34 Do Chordata have appendages?
- 35 Are echinoderms cephalized?
- 36 Are chordates endoskeleton or exoskeleton?
- 37 Are flatworms segmented or unsegmented?
- 38 In which of the following flatworm segmented body is found?
- 39 Are flatworms Diploblastic or triploblastic?
- 40 Is tapeworm dioecious?
- 41 Which is dioecious parasite?
- 42 Is fasciola monoecious or dioecious?
- 43 Are flatworms prokaryotic or eukaryotic?
- 44 How do flatworms maintain homeostasis?
- 45 What are the three classes of flatworms?
- 46 What are 3 characteristics of flatworms?
- 47 How are flatworms classified and what are their characteristics?
- 48 Do flatworms have an exoskeleton?
- 49 Do flatworms have appendages?
- 50 Do flatworms have a pseudocoelom?
- 51 Do nematodes have jointed appendages?
- 52 Do flatworms have muscles?
- 53 What are circular muscles?
- 54 Does a worm have legs?
Do flatworms have blood?
Flatworms: These include tapeworms, which are parasites (meaning they live on a host organism), and planaria, which live in ponds and lakes. These animals are so flat they don’t even need blood. They absorb oxygen through their skin and it spreads directly to every cell in their body.
Are flat worms Cephalized?
Flatworms have a cephalized nervous system that consists of head ganglion, usually attached to longitudinal nerve cords that are interconnected across the body by transverse branches.
How are flatworms able to survive without a circulatory system while humans can t?
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.
What cells do flatworms have?
The flatworms are acoelomate triploblasts—i.e., they lack a body cavity and have three embryonic tissue layers: endoderm, mesoderm, and ectoderm. Also, they are unsegmented, and the bulk of their body is occupied by mesenchyme.
How does gaseous exchange occur in flatworms?
Platyhelminthes exchange gases exclusively by diffusion through their body surface. This is only possible because all cells are localized relatively near to the exterior since gases diffuse cell by cell the flat shape of these worms is a feature that allows this type of respiration.
Do flatworms have a complete digestive system?
Physiological Processes of Flatworms
Most flatworms have a gastrovascular cavity rather than a complete digestive system; in such animals, the “mouth” is also used to expel waste materials from the digestive system. Some species also have an anal opening. The gut may be a simple sac or highly branched.
Do flatworms have appendages?
They are characterized by a segmented body and jointed appendages. In the basic body plan, a pair of appendages is present per body segment. Within the phylum, classification is based on mouthparts, number of appendages, and modifications of appendages.
Do flatworms have 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 Platyhelminthes have jointed appendages?
These jointed appendages are used by an organism for locomotion, sensing, feeding, etc. The animals with jointed appendages have a segmented body and a hard exoskeleton made of chitin. Complete answer: i) Flatworm: The flatworms belong to the phylum of Platyhelminthes.
Are sponges cephalized?
Sponges have no particular symmetry; they are not radially or bilaterally symmetrical. Cephalization means having a head. For humans and many other animals, our head is the part of the body that has the brain and most of the sensory organs.
Are flatworms 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 roundworms Monoecious or dioecious?
The majority of nematodes are dioecious ; that is, the sexes are separate. Some species, however, are hermaphroditic, having both male and female reproductive organs.
Are chordates cephalized?
Exhibit all 5 chordate characteristics at sometime in their life • Usually well cephalized, including a well developed brain and anterior sensory structures • Brain is usually encased in a skull, made of hard bone or a cartilage. In most vertebrates, the embryonic notochord is replaced by a vertebral column.
Are flatworms heterotrophic or autotrophic?
Flatworms are free-living heterotrophs or parasites.
What characteristics do flatworms have?
- Flatworms have no true body cavity, but they do have bilateral symmetry. …
- Flatworms have an incomplete digestive system. …
- Flatworms do not have a respiratory system. …
- There are no blood vessels in the flatworms.
Do roundworms have appendages?
Nematodes (roundworms) are colorless, unsegmented, and do not have appendages. Nematodes may be free-living, predaceous, or parasitic, and many of the parasitic species cause important diseases of plants, animals, and humans.
Do flatworms have circular muscles?
The planarian has opposing muscles, circular muscles that extend around the flatworm and longitudinal muscles that extend from anterior to posterior of the flatworm. If the circular muscles contract, the flatworm changes shape to become long and thin.
What are the organs for gas exchange in flatworms?
Surface area | Respiratory organs | |
---|---|---|
Flatworms | Flat body shape | None |
Cnidarians | Oral arms | None |
Reptiles | Many lamellae and filaments per gill | Lungs |
Amphibians | Many lamellae and filaments per gill | Lungs, skin and gills |
Do Mollusca have appendages?
Arthropoda | Mollusca |
---|---|
Arthropods have wings to fly with jointed legs usually to their abdominal segments. | Molluscs have a muscular foot that helps in locomotion. |
Where does the exchange of gases occur in birds?
Gas exchange takes place between the air capillaries and blood capillaries, making this surface analogous to the alveolar surface in mammals. There are several important differences in the mechanism and pattern of lung ventilation in birds compared with other vertebrates with lungs.
Where does exchange of gases take place?
During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
Does the planarian have a complete or incomplete digestive system?
Figure 1: This planarian is a free-living flatworm that has an incomplete digestive system, an excretory system with a network of tubules throughout the body, and a nervous system made up of nerve cords running the length of the body with a concentration of nerves and photosensory and chemosensory cells at the anterior …
Why does flatworms have no digestive system?
Because they don’t have a body cavity, flatworms are considered acoelomates. They have simple digestive systems, with mouths to take in food and long digestive tracts to diffuse it around the body. Most flatworms take in food via their mouth, then move it into a digestive gut that attaches to the digestive structures.
Which phyla has incomplete digestion?
Incomplete digestive system is found in platyhelminthes.
Do flatworms have a coelom?
Flatworms are hermaphroditic and capable of sexual and asexual reproduction. Their bodies have only a single opening, which serves as both a mouth and an anus. They are, as their name implies, flat. They have no circulatory system or body cavity (coelom), but they do have an excretory and digestive system.
How are respiration and circulation accomplished in flatworms?
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.
Do Cnidaria have appendages?
Yes, some the members of the Cnidaria phylum have appendages.
Do annelids have appendages?
Appendages are absent in Annelids. Arthropods have jointed appendages.
Do sponges have appendages?
So, the correct answer is ‘Appendages‘.
Do flatworms have a central nervous system?
The bilaterally flattened body of flatworms preserves a common organization of the central nervous system (CNS). The CNS of flatworms consists of: (i) the orthogon, composed of main longitudinal nerve cords and transverse commissures that form a ladder-like network.
What are jointed appendages?
A jointed appendage can be defined as the growth from the body of organism having joints in it. Jointed appendages is common charateristic of arthropoda. Jointed appendages in arthropodes may include legs, wings and mouth parts.
Are sponges Heterotrophs?
Sponges are multicellular, heterotrophic parazoan organisms, characterized by the possession of unique feeding system among the animals. They are the most primitive types of animals in existence, featuring a cell-based organization where different cells have different tasks, but do not form tissues.
Are sponges aquatic?
Sponges — simple aquatic animals with dense, yet porous, skeletons — are highly adapted to their environments.
Do Chordata have appendages?
All other chordates are craniates: they have a brain and a skull. There are two subphyla: the Agnatha, which lack jaws and paired appendages, and the Gnathostomata, which have jaws and usually have paired appendages as well.
Are echinoderms cephalized?
Echinoderms, or sea stars, also lack cephalization. Nearly all animals not falling into one of these categories exhibits some degree of cephalization.
Are chordates endoskeleton or exoskeleton?
Exoskeleton | Endoskeleton |
---|---|
Must be molted for organism to grow – makes organism vulnerable during molting times | Does not have to be molted – grows with organism |
Are flatworms segmented or unsegmented?
Three types of worms with different body types will be explored in this lesson: Flatworms, which have ribbon-like bodies with no body cavity. Roundworms, which have a body cavity but no segments. Segmented worms, which have both a body cavity and segmented bodies.
In which of the following flatworm segmented body is found?
Question | Among the Platyhelminthes, body segmentation, is found in |
---|---|
Question Video Duration | 2m5s |
Are flatworms Diploblastic or triploblastic?
Flatworms are triploblastic in nature which means it has the body composed of three germ layers. They are mesoderm, ectoderm and endoderm.
Is tapeworm dioecious?
Aurelia is dioecious animals whereas liver fluke, tapeworm, earthworm are monoecious means male and female reproductive organs are present in the same individuals.
Which is dioecious parasite?
So, the correct answer is ‘Ascaris‘
Is fasciola monoecious or dioecious?
F. hepatica adult flukes are hermaphrodite; each contains both male and female reproductive organs.
Are flatworms prokaryotic or eukaryotic?
Kingdom: Animalia – Flatworms fall under the animal kingdom that is characterized by multicellular eukaryotic organisms.
How do flatworms maintain homeostasis?
Flatworms have two tubular excretory organs that excrete wastes as well as maintaining the homeostasis of its salt to water ratio. It works by using flame cells located on the edges of the tubules to propel water and waste with tiny cilia through the tubules and out of the body.
What are the three classes of flatworms?
Phyla Platyhelminthes and Nemertea. The Platyhelminthes includes three classes: the Turbellaria (free-living flatworms), the Trematoda (flukes), and the Cestoda (tapeworms).
What are 3 characteristics of flatworms?
Attribute | Cnidarians and Ctenophores | Platyhelminthes (flatworms) |
---|---|---|
Bilateral symmetry | No | Yes |
Number of main cell layers | Two, with jelly-like layer between them | Three |
Distinct brain | No | Yes |
Specialized digestive system | No | Yes |
How are flatworms classified and what are their characteristics?
Flatworms are unsegmented worms with a tail and a head end. They are bilaterally symmetrical with a definite upper and lower surface. They have no body cavity or and no specialized respiratory or circulatory organs. This is the reason behind the flat shape, common to all flatworms.
Do flatworms have an exoskeleton?
Exoskeleton and endoskeleton are absent in members of phylum Platyhelminthes. These are the first group of animals where three primary germ layers develop, i.e. ectoderm, mesoderm and endoderm.
Do flatworms have appendages?
They are characterized by a segmented body and jointed appendages. In the basic body plan, a pair of appendages is present per body segment. Within the phylum, classification is based on mouthparts, number of appendages, and modifications of appendages.
Do flatworms have a pseudocoelom?
Another similarity to flatworms is that they lack an enclosed circulatory and respiratory system. The two most prominent features that distinguish roundworms from flatworms are the presence of a pseudocoelom, or partially developed body cavity, and a complete digestive tract with two openings, a mouth and an anus.
Do nematodes have jointed appendages?
The nematodes, or roundworms, possess a pseudocoelom and consist of both free-living and parasitic forms. Finally, the arthropods, one of the most successful taxonomic groups on the planet, are coelomate organisms with a hard exoskeleton and jointed appendages.
Do flatworms have muscles?
The well-developed muscular system present in flatworms is comprised of a subcuticular musculature consisting of layers of circular, longitudinal, and diagonal muscles close to the epidermis, and a mesenchymal musculature consisting of dorsoventral, transverse, and longitudinal fibres passing through the mesenchyme.
What are circular muscles?
”’circular muscles. – muscle layer encircling the body between the epidermis and longitudinal muscle layer. Last updated on June 24th, 2021. AD.
Does a worm have legs?
Worms don’t have limbs, so they stretch and contract muscles in their body to move about. They are helped by tiny bristles covering their bodies that allow them to grip surfaces.