Description : Poriferans and cnidarians do not have excretory systems. Do platyhelminthes have an excretory system?
Last Answer : Platyhelminthes have a primitive excretory system made of flame cells (also called solenocytes), excretory ducts and excretory pores. Image Diversity: platyhelminth excretory system
Description : Which of the following animals are true coelomates with bilateral symmetry? (a) Adult Echinoderms (b) Aschelminthes (c) Platyhelminthes (d) Annelids
Last Answer : (d) Annelids
Description : Which one of the following is not a characteristic of Phylum Annelida? (a) Pseudocoelom (b) Ventral nerve cord (c) Closed circulatory system (d) Segmentation
Last Answer : (a) Pseudocoelom
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.
Description : Do echinoderms have respiratory and circulatory systems?
Last Answer : In echinoderms there are not well-defined respiratory (with the exception of the holothurian group) and circulatory systems. The ambulacral hydrovascular system plays the function of these systems.
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
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
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).
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).
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.
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).
Description : Echinoderm identity card. How are echinoderms 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: sea cucumber, sea urchin, starfishes. Basic morphology: calcareous endoskeleton with spines, ambulacral system. Type of symmetry: secondary radial. Germ layers and ... cephalization. Types of reproduction: sexual, with larval stage. Phylum Chordata - Study Here
Description : Nematode identity card. How are nematodes 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: ascaris, hookworms, filaria, pinworms. Basic morphology: cylindric (round) body, not segmented. Type of symmetry: bilateral. Germ layers and coelom: ... ganglial chord, primitive cephalization. Types of reproduction: sexual. Phylum Annelida - Q&A Review
Description : The closed circulatory system is more efficient. Since blood circulates only inside blood vessels it can do it with more pressure reaching farther distances between the organs where hematosis ... exchange independently from the circulation) are generally slower and have a low metabolic rate.
Last Answer : What is the difference between octopuses and mussels regarding their circulatory systems?
Description : A closed circulatory system is one in which blood circulates only inside blood vessels. For this reason the blood pressure is higher in animals with closed circulatory system. The ... annelids, cephalopod molluscs and vertebrates. The Circulatory System - Image Diversity: closed circulatory system
Last Answer : What are the advantages of the closed circulatory system over the open circulatory system?
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
Description : Open circulatory system is the one in which blood does not circulate only inside blood vessels but it also falls in cavities that irrigate tissues. In the open circulatory system ... and protochordates have open circulatory system. The Circulatory System - Image Diversity: open circulatory system
Last Answer : What is a closed circulatory system?
Description : How are the circulatory systems of animals classified?
Last Answer : A circulatory system is classified as open or closed. In open circulatory systems blood gets out of vessels and flows also to large cavities that perfuse the tissues to be irrigated. ... within blood vessels and through the heart. Image Diversity: closed circulatory system open circulatory system
Description : List the three kinds of blood vessels of human circulatory system and write ¦ their functions in tabular form. -Biology
Last Answer : Three types of blood vessels in human circulatory system are: Arteries, Veins and Capillaries. Their functions are tabulated below:
Description : Assertion` :` In open circulatory system blood is pumped by heart passes throgh large vessels into open spaces or body cavities called sinuses. Reason
Last Answer : Assertion` :` In open circulatory system blood is pumped by heart passes throgh large vessels into open ... D. If both Assertion & Reason are false.
Description : Where can I find information on avascular necrosis?
Last Answer : One of the best places to find out about diseases and symptoms is by visiting the Mayo Clinic's website. Here is a direct link to avascular necrosis if you are interested http://www.mayoclinic.com/health/avascular-necrosis/DS00650. I hope this helps!
Description : Do echinoderms have an excretory system? How is excretion done in these animals?
Last Answer : Echinoderms do not have an excretory system. Their excretions are eliminated by diffusion.
Description : What is is the most common form of behavior in simple animals like cnidarians worms?
Last Answer : instinctive behavior
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
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)
Description : Evolutionarily protochordates may be intermediate animals between invertebrates and vertebrates. Imagine a scientist is testing the hypothesis that vertebrates evolved from echinoderms. Having as research object a newly ... the hypothesis? What is an example of a discovery that would strengthen it?
Last Answer : Hypothesis to be tested: Vertebrates evolved from echinoderms. Testing material: A newly found protochordate species (i.e., a vertebrate forerunner). Example of weakening observation (that ... shows how science works, beginning with the placement of hypothesis and further observational testing.)
Description : Are nematodes diploblastic or triploblastic animals?
Last Answer : Just like platyhelminthes, nematodes are triploblastics, i.e., they present three germ layers (ectoderm, mesoderm and endoderm). Phylum Nematoda Review - Image Diversity: germ layers
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.
Description : Bilaterally symmetrical and acoelomate animals are exemplified by (a) ctenophora (b) platyhelminthes (c) aschelminthes (d) annelida
Last Answer : (b) platyhelminthes
Description : Which one of the following statements about certain given animals is correct? (a) Roundworms (Aschelminthes) are pseudo- coelomates. (b) Molluscs are acoelomates. (c) Insects are pseudocoelomates. (d) Flatworms (Platyhelminthes) are
Last Answer : (a) Roundworms (Aschelminthes) are pseudo- coelomates.
Description : The chemoreceptors that participate in the ventilation control are structures that collect information about the acidity and alkalinity of the blood. The information is then transmitted by nervous ... by receptors that receive pH information from the cerebrospinal fluid.) The Circulatory System
Last Answer : What is circulation?
Description : How does the circulatory system cooperate with the respiratorydigestiveexcretory systems?
Last Answer : Need answer
Description : The circulatory systems can be classified into open circulatory system and closed circulatory system.
Last Answer : What is an open circulatory system?
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
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.
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
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
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
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
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
Description : What In animals that lack a circulatory system how are materials transported?
Last Answer : Feel Free to Answer
Description : How are the circulatory system in animals and the vascular system in plants different?
Description : In animals that do not present the circulatory system the transport of substances occurs by cell to cell diffusion. The blood is a fundamental means of substance transport for larger animals ... there are tissues distant from each other and from the environment thus making diffusion impossible.
Last Answer : What are the two types of circulatory systems?
Description : What is the type of circulatory system present in arthropods? Do these animals have heart and respiratory pigments?
Last Answer : In arthropods the respiratory system is open (lacunar). Blood, also known as hemolymph, is pumped by a heart and falls into cavities (lacunas) irrigating and draining tissues. All arthropods have ... blood does not carry gases (in them gases reach tissues and cells through tracheal structures).
Description : In which of the following animals, is open circulatory system found? (1) Prawn (2) Earthworm (3) Toad (4) Man
Last Answer : (1) Prawn Explanation: The open circulatory system is a system in which fluid in a cavity called the hernocoel bathes the organs directly with oxygen and nutrients and there is no ... this combined fluid is called hemolyrnph or hemolymph. Arthropods and mollusks have an open circulatory system.
Description : Animals having open circulatory system POSSESSES – (1) coelenteron (2) spongocoel (3) pseudocoel (4) haemocoel
Last Answer : (4) haemocoel Explanation: Open circulatory system is the one in which blood does not circulate only inside blood vessels but it also falls in cavities that irrigate tissues. The internal organs are suspended in a network of blood-filled sinuses or open spaces which collectively form the haemocoel.
Description : Define the circulatory system of animals. What are its main types?
Last Answer : It is system by which materials are transported within the body in a fluid which circulates in the body. In many vertebrates this fluid is called hemolymph, while in all vertebrates and in some ... to the blood vessels during circulation. It is elaborated, complicated and efficient system.
Last Answer : Prawn
Description : Animals having open circulatory system possesses : (1) coelenteron (2) spongocoel (3) pseudocoel (4) haemocoel
Last Answer : haemocoel
Description : What is the connection between the circulatory and respitory systems?