Poriferans and cnidarians do not have excretory systems. Do platyhelminthes have an excretory system?

Poriferans and cnidarians do not have excretory systems. Do platyhelminthes have an excretory system?
by

1 Answer

Answer :

Platyhelminthes have a primitive excretory system made of flame cells (also called solenocytes), excretory ducts and excretory pores. Image Diversity: platyhelminth excretory system
by
selected by

Related questions

Not all animals have a circulatory system. Poriferans, cnidarians, platyhelminthes and nematodes (in these there are the pseudocoelom fluid but no vessels) are avascular animals. Echinoderms do not have true circulatory systems either.

Description : Not all animals have a circulatory system. Poriferans, cnidarians, platyhelminthes and nematodes (in these there are the pseudocoelom fluid but no vessels) are avascular animals. Echinoderms do not have true circulatory systems either.

Last Answer : What is the alternative means for transport of substances in animals without a circulatory system? Why is blood important for larger animals?

Concerning tissue complexity how different are cnidarians from poriferans?

Description : Concerning tissue complexity how different are cnidarians from poriferans?

Last Answer : Cnidarians have true tissue differentiation, they present distinct organized tissues in the body. Poriferans present only some dispersed specialized cells with no tissue differentiation.

Is the nervous system in platyhelminthes more or less sophisticated than in cnidarians? What are the main neural structures found in flatworms? How is this neural organization important for the diversity of biological niches explored by species of the phylum?

Description : Is the nervous system in platyhelminthes more or less sophisticated than in cnidarians? What are the main neural structures found in flatworms? How is this neural organization important for the diversity of biological niches explored by species of the phylum?

Last Answer : Platyhelminthes present a more sophisticated nervous system than cnidarians, as the first neural chords with ganglia (grouping of neurons) appear, a characteristic of the evolutionary process of ... that are parasites and those that are free-living. Image Diversity: platyhelminth nervous system

Platyhelminth identity card. How are platyhelminthes characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Platyhelminth identity card. How are platyhelminthes characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: planarias, schistosomes, taenias. Basic morphology: flat worm. Type of symmetry: bilateral. Germ layers and coelom: triploblastics, acoelomates. Digestive system: ... , beginning of cephalization. Types of reproduction: asexual and sexual. Phylum Nematoda Review

In platyhelminthes, the excretory organs are

Description : In platyhelminthes, the excretory organs are

Last Answer : In platyhelminthes, the excretory organs are A. Nephridia B. Nephrons C. Flame cells D. Archeocytes

Solenocytes are the main excretory structures in (a) echinodermates (b) platyhelminthes (c) annelids (d) molluscs.

Description : Solenocytes are the main excretory structures in (a) echinodermates (b) platyhelminthes (c) annelids (d) molluscs.

Last Answer : (b) platyhelminthes

The middle layer in body wall of porifera is or The non-cellular layer present between pinacoderm and choanoderm in body wall of poriferans is known a

Description : The middle layer in body wall of porifera is or The non-cellular layer present between pinacoderm and choanoderm in body wall of poriferans is known a

Last Answer : The middle layer in body wall of porifera is or The non-cellular layer present between pinacoderm ... Msoderm B. Mesenchyme C. Mesoglea D. Mesentery

Concerning digestion how are poriferans characterized?

Description : Concerning digestion how are poriferans characterized?

Last Answer : Sponges are different from other animals since they present only intracellular digestion. They do not have a digestive system nor do they release digestive enzymes in the spongocoel to cause extracellular break down of nutrients.

What are the main cells of which poriferans are made?

Description : What are the main cells of which poriferans are made?

Last Answer : Sponges have their outer wall covered by flat cells called pinacocytes and having pores well-delimited by special cells called porocytes. The internal wall is filled with choanocytes, ... made of spicules and organic fibers.) Sponges Review - Image Diversity: pinacocytes porocyteschoanocytes

What is the typical shape of poriferans?

Description : What is the typical shape of poriferans?

Last Answer : Sponges have bodies in the form of tubular vases or globes open in the upper extremity. They have an internal central cavity and porous walls. The central cavity is called spongocoel and the opening in the upper extremity is called osculum. Sponges Review - Image Diversity: sponge structure

What are poriferans?

Description : What are poriferans?

Last Answer : The phylum Porifera contains the simplest creatures of the animal kingdom. Sponges are aquatic sessile beings (they are not able to move by themselves and they keep themselves attached to ... multicellular, like all beings of the animal kingdom. Sponges Review - Image Diversity: poriferans

In case of poriferans, the spongocoel is lined with flagellated cells called (a) oscula (b) choanocytes (c) mesenchymal cells (d) ostia.

Description : In case of poriferans, the spongocoel is lined with flagellated cells called (a) oscula (b) choanocytes (c) mesenchymal cells (d) ostia.

Last Answer : (b) choanocytes

In case of poriferans, the spongocoel is lined with flagellated cells called: (1) oscula (2) choanocytes (3) mesenchymal cells (4) ostia

Description : In case of poriferans, the spongocoel is lined with flagellated cells called: (1) oscula (2) choanocytes (3) mesenchymal cells (4) ostia

Last Answer : (2) choanocytes

Why do Cnidaria not need respiratory or excretory systems?

Description : Why do Cnidaria not need respiratory or excretory systems?

Last Answer : Need answer

How does the excretory and respiratory systems interact?

Description : How does the excretory and respiratory systems interact?

Last Answer : What is the answer ?

Which describes a link between the nervous and excretory systems?

Description : Which describes a link between the nervous and excretory systems?

Last Answer : Nerves detect changes to salt levels in the blood.

How are the excretory systems of the three main arthropod classes constituted?

Description : How are the excretory systems of the three main arthropod classes constituted?

Last Answer : In crustaceans a pair of excretory organs called green glands exists. The green glands collect residuals from the blood and other parts of the body. They are connected by ducts to ... the limbs that also participate in excretion. Phylum Arthropoda - Image Diversity: arthropod excretory system

Do sponges have nervous, circulatory and excretory systems?

Description : Do sponges have nervous, circulatory and excretory systems?

Last Answer : Sponges do not have a nervous system neither circulatory system nor excretory system.

The cylindrical body form of cnidarians is called? -Biology

Description : The cylindrical body form of cnidarians is called? -Biology

Last Answer : answer:

The phenomenon of alternation of generation between asexual and sexual reproduction in cnidarians.

Description : The phenomenon of alternation of generation between asexual and sexual reproduction in cnidarians.

Last Answer : Name the following: The phenomenon of alternation of generation between asexual and sexual reproduction in cnidarians.

The gastrovascular cavity in cnidarians

Description : The gastrovascular cavity in cnidarians

Last Answer : Give one word for the following: The gastrovascular cavity in cnidarians

1. The stinging cells on the tentacles of cnidarians are known as _______. 

Description : 1. The stinging cells on the tentacles of cnidarians are known as _______. 

Last Answer : Fill in the blanks. 1. The stinging cells on the tentacles of cnidarians are known ... The annelid with locomotory structures like setae is ________

How do cnidarians give birth?

Description : How do cnidarians give birth?

Last Answer : They don't. Only mammals give birth to live young. Cnidariansrelease their eggs and sperm into the water and they are fertilizedthat way and hatch out into baby cnidarians.

What is is the most common form of behavior in simple animals like cnidarians worms?

Description : What is is the most common form of behavior in simple animals like cnidarians worms?

Last Answer : instinctive behavior

What are the body plan of cnidarians?

Description : What are the body plan of cnidarians?

Last Answer : In general the have a round body shape with some sort of radial symmetry. (there are exceptions)

How does a cnidarians reproduce?

Description : How does a cnidarians reproduce?

Last Answer : Cnidarian do have eggs and sperm. These will become larvae and then the find a good place to stay so they set down roots and become a polyp.

What are the types of reproduction presented by cnidarians?

Description : What are the types of reproduction presented by cnidarians?

Last Answer : They present asexual and sexual reproduction.

How is the nervous tissue distributed in cnidarians?

Description : How is the nervous tissue distributed in cnidarians?

Last Answer : Their nervous system is diffuse, there are no brain or ganglia.

What is the type of digestion that occurs in cnidarians?

Description : What is the type of digestion that occurs in cnidarians?

Last Answer : These animals have a digestive cavity and they make extracellular and intracellular digestion. The extracellular digestion takes place within the digestive cavity.

Which are the germ layers present in cnidarians? Which tissues of the animal do they originate?

Description : Which are the germ layers present in cnidarians? Which tissues of the animal do they originate?

Last Answer : These beings present ectoderm and endoderm, two germ layers. Animals with only two germ layers are called diploblastic animals. The ectoderm gives birth to the epidermis and the endoderm originates the covering of the digestive cavity. Image Diversity: germ layers

What are the two main morphological patterns of cnidarians? Concerning locomotion how do these forms differentiate from each other?

Description : What are the two main morphological patterns of cnidarians? Concerning locomotion how do these forms differentiate from each other?

Last Answer : Morphologically, cnidarians classify as polyps or medusae. Polyps are cylindrical and medusae are circular convex, like an umbrella. Both shapes have tentacles. In general polyps are sessile ... cnidarians alternate polypoid and medusoid forms in their life cycle. Image Diversity: polyps medusae

What are some examples of cnidarians? In which environments can these animals be found?

Description : What are some examples of cnidarians? In which environments can these animals be found?

Last Answer : Jellyfish, hydra, corals and sea anemones are good examples. All of them are aquatic and most live in the sea. Image Diversity: jellyfish hydra corals sea anemone

Which one of the following groups of animals is bilaterally symmetrical and triploblastic? (a) Aschelminthes (roundworms) (b) Ctenophores (c) Sponges (d) Coelenterates (cnidarians)

Description : Which one of the following groups of animals is bilaterally symmetrical and triploblastic? (a) Aschelminthes (roundworms) (b) Ctenophores (c) Sponges (d) Coelenterates (cnidarians)

Last Answer : (a) Aschelminthes (roundworms)

How is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in nematodes and platyhelminthes?

Description : How is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in nematodes and platyhelminthes?

Last Answer : Annelids have a nervous system made of two ventral chords and one relatively big nervous cell concentration in its anterior portion resembling a primitive brain. Nematodes have an anterior neural ... is more outstanding than in nematodes or in flatworms. Image Diversity: earthworm nervous system

What are the types of digestion and of digestive system of platyhelminthes?

Description : What are the types of digestion and of digestive system of platyhelminthes?

Last Answer : Flatworms have incomplete digestive systems and they present extracellular and intracellular complementary digestions. Image Diversity: platyhelminth digestive system

Which is the animal of Platyhelminthes episode ?

Description : Which is the animal of Platyhelminthes episode ?

Last Answer : The tapeworm is an animal of the Platyhelminthes episode.

In constrast to annelids the Platyhelminthes show

Description : In constrast to annelids the Platyhelminthes show

Last Answer : In constrast to annelids the Platyhelminthes show A. Absence of body cavity B. Presence of pseudocoel C. Radial symmetry D. Bilaterla Symmetry

Comment on the reproduction of the members of the phylum Platyhelminthes.

Description : Comment on the reproduction of the members of the phylum Platyhelminthes.

Last Answer : Comment on the reproduction of the members of the phylum Platyhelminthes.

Mention the unique features of phylum Platyhelminthes.

Description : Mention the unique features of phylum Platyhelminthes.

Last Answer : Mention the unique features of phylum Platyhelminthes.

Is a jellyfish a platyhelminthes?

Description : Is a jellyfish a platyhelminthes?

Last Answer : Need answer

Are Platyhelminthes acoelomates, pseudocoelomates or coelomates?

Description : Are Platyhelminthes acoelomates, pseudocoelomates or coelomates?

Last Answer : Acoelomates

Which are the morphological features that differentiate the beings of the phylum Annelida from nematodes and platyhelminthes?

Description : Which are the morphological features that differentiate the beings of the phylum Annelida from nematodes and platyhelminthes?

Last Answer : Platyhelminthes are worms with flat bodies (flatworms), nematodes are worms with cylindrical but not segmented bodies (roundworms). Annelids are cylindrical worms with segmented bodies (they are metameric).

Compared to platyhelminthes which physiological problem have the cylindrical body of nematodes brought? How was that problem solved?

Description : Compared to platyhelminthes which physiological problem have the cylindrical body of nematodes brought? How was that problem solved?

Last Answer : The cylindrical shape of nematodes made impossible the respiration exclusively by simple diffusion among cells since there are tissues far from the exterior. This problem was solved by the ... respiration is cutaneous; it is considered that these animals still make respiration by diffusion).

What is the typical morphological feature of nematodes that differentiates them from platyhelminthes?

Description : What is the typical morphological feature of nematodes that differentiates them from platyhelminthes?

Last Answer : Nematodes are also known as roundworms. As the name indicates they are not flat like platyhelminthes. In evolutionary grounds with the nematodes the first complete digestive system appears, with mouth and anus, and the pseudocoelom is also a novelty.

What are the main human diseases caused by platyhelminthes?

Description : What are the main human diseases caused by platyhelminthes?

Last Answer : The main human diseases caused by platyhelminthes are schistosomiasis, tapeworm disease (cestodiasis) and cysticercosis. (Note:Diseases are studied in the “Diseases” division of this site.)

Into which classes are platyhelminthes divided? How are these classes characterized and what are some representative beings of each of them?

Description : Into which classes are platyhelminthes divided? How are these classes characterized and what are some representative beings of each of them?

Last Answer : Platyhelminthes are divided into three classes: turbellarians (or Turbellaria), trematodes (or Trematoda) and cestodes (or Cestoda). Turbellarians are free-living platyhelminthes and their ... saginata and Taenia solium) that parasite humans. Image Diversity: turbellarians trematodes cestodes

What is the type of reproduction, sexual or asexual, that occurs in platyhelminthes?

Description : What is the type of reproduction, sexual or asexual, that occurs in platyhelminthes?

Last Answer : Platyhelminthes may present sexual or asexual reproduction.

How many germ layers originate the body of platyhelminthes? In relation to this characteristic how are these animals classified?

Description : How many germ layers originate the body of platyhelminthes? In relation to this characteristic how are these animals classified?

Last Answer : Platyhelminthes are the first triploblastic animals (remember that cnidarians are diploblastic), i.e., they present three germ layers: ectoderm, mesoderm and endoderm.

What is the main external morphological feature that differentiates platyhelminthes from other worms (nematodes)?

Description : What is the main external morphological feature that differentiates platyhelminthes from other worms (nematodes)?

Last Answer : Platyhelminthes are also known as flatworms because they are worms with a flat body. This is the main external morphological feature that differentiates them from nematodes (roundworms).

Crabs belongs to the phylum – (1) Mollusca (2) Cnidaria (3) Arthropoda (4) Platyhelminthes

Description : Crabs belongs to the phylum – (1) Mollusca (2) Cnidaria (3) Arthropoda (4) Platyhelminthes

Last Answer : (3) Arthropoda Explanation: Crabs come from the same family as lobsters, crayfish, shrimp, krill and barnacles, as all are in the subphylum crustacea. They are also in the phylum Arthropoda.