Does a Coelacanth have gills or flaps, a bouyancy system and what type is their body covering?
114605
Having gills is prerequisite for being a FISH, dear. In fact, their scales secrete a gunk that acts as a laxative. Yes, they have a swim bladder, but it works more like a shark's liver than a typical swim bladder.
1167045
two things can happen after they become warm blooded\n\n1)if they continue to live in water then they must have a stronger better gills  \nwith more oxygen extracting capacity to keep thier blood warm in the water\nthey will eat more\n\n2)if they decide to come on land then their gills would be converted to lungs
1010312
yes.\n\nthey are mammals and do not breathe underwater.\n\nthey take in air at the surface, so it does not matter what type of water they live in.
332957
1. Porifera (sponges), Cnidaria (jellyfish, coral polyps etc.), Ctenophora (comb-jellies), Placozoa (Trichoplax)\nIf we are speaking only about animals with distinct tissues, we must exclude Porifera.\n\n2. Mesoderm gives rise to muscle, connective tissue and circulatory system. So there are no specialized muscle cells (only "skin-muscle" cells) and no circulatory system in those animals. There are other parts that will be missing from those animals but not due to the lack of mesoderm - e.g., organ systems as such (even flatworms have defined digestive and excretory systems, for example).
1146931
They are arachnids, not crustaceans. Easy to find on the Indian Ocean shores. Dead animals eaters. Breath using gills, two sexed animals, egg layers, free swimmers. Outstanding feature: their blood is used as a reactive in a positive detection of human encephalitis.\n\nmore info: Barnes book of invertebrates
269104
The Annelida have bilateral symmetry .The annelids also have a one-way digestive system . It has a segmented anterior with 8 hearts in each. It also has a body cavity. \n\nThe Mollusks are also bilateral like the annelids. They have a good nervous system. They also have a one-way digestive system. They have a coelom like the . The classes of mollusks are the bivalves, which have two valves, which the name suggests. It has 2 shells and 3 layers also. It has a mantle and it lives in the water. It has gills and abductor muscles. It has an excurrent and incurrent siphon, which no other phylum has. There are the gastropods, which live in land and ocean. It has one shell and one foot. There are also the cephalopods, which has tentacles a foot that can either be a sucker or hook.
1142424
Everyone is right:  because they have gills.\n\nBut, nobody seems to understand why gills do not work out of water.  It is true that the air we breath has more oxygen than most water, so the problem is not a lack of O2.  Also, the person that said they get  overdosed with O2 is incorrect.  \n\nGills are very delicate structures that are supported by the water.  Remember:  water is more dense than air.  So, the delicate (almost feathery) structures of gills that grab oxygen from the water will colapse when removed from the supportive water.
680740
if its called a fish of any kind it has gills
570457
Mollusks are triploblastic protostomes. The principal body cavity is a blood-filled hemocoel. It is unknown whether they have a true coelom (eucoelom); any coelomic cavities have been reduced to vestiges around the hearts, gonads, and metanephridia (kidney-like organs). The body is often divided into a head, with eyes or tentacles, a muscular foot and a visceral mass housing the organs.\n\nMollusks have a mantle, which is a fold of the outer skin lining the shell, and a muscular foot that is used for motion. Many mollusks have their mantle produce a calcium carbonate external shell and their gill extracts oxygen from the water and disposes waste. All species of the phylum Mollusca have a complete digestive tract that starts from the mouth to the anus. Many have a feeding structure, the radula, mostly composed of chitin. Radulae are diverse within the Mollusca, ranging from structures used to scrape algae off rocks, to the harpoon-like structures of cone snails. Cephalopods (squid, octopuses, cuttlefish) also possess a chitinous beak. Unlike the closely related annelids, mollusks lack body segmentation.\n\nDevelopment passes through one or two trochophore stages, one of which (the veliger) is unique to the group. These suggest a close relationship between the mollusks and various other protostomes, notably the Annelids.\n\nMollusk fossils are some of the best known and are found from the Cambrian onwards.
578858
Question is a little vague......anatomy is structural and function is physiological, so I am not sure what your question really is; is it about anatomy or physiology or both? So RSVP:  Are you asking about the unique physiology or anatomy of amphibians?\n\nThey have many structures in common with the other tetrapod vertebrates, but also have unique structures as amphibians.  Plus each sub-class-type of amphibian (frogs-toads) vs (newts-salamanders) vs caecilians are each different.\n\nAll amphibians have their unique slimey scaleless skin through which they attain most of their oxygen and release their CO2 by diffusion, their 3-chambered heart with 2 atria and 1 ventricle, their external fertilization type reproductive system that has egg-larva-tadpole and adult.  Their respiratory system changes at each stage of development. As tadpoles they use their gills. As they metamorphose to adults,the gills are absorbed and lungs develop to breathe air although they lack a diaphragm and ribs (in most...some amphibians retain larval stage for their whole life...axolotyl). They have kidneys and bladder for excretory system; endoskeleton is bone and has most of the same bones as us, although some are fused (radio-ulna, fibulo-tibia; no skull protecting brain, unusual urostyle bone of pelvis.
229402
jellyfish 'breathe' by simple diffusion of oxygen from the water around them.  they don't have much of a metabolism, so don't require huge amounts of oxygen.\n\ncrabs and prawns are both crustaceans, and breathe through series of leaf-shaped gills under their abdomen called phyllopods.\n\nsea stars i can't recall for sure, but i think they also breathe primarily through diffusion between their skin and the water (again, not terribly active, so low metabolic needs).\n\noctopus breathe through large feathery gills inside their mantle.  each gill has its own associated heart to help spread the oxygenated blood around the body.\n\nsea snakes have lungs just like you or I do (although one lung is usually very tiny or even totally missing) and need to breathe air.  they swim to the surface every so often to take a breath before diving back under the sea.
1155102
As we come to the vertebrates, we begin to find real efficiencies with the closed system. Fish possess one of the simplest types of true heart. A fish's heart is a two-chambered organ composed of one atrium and one ventricle. The heart has muscular walls and a valve between its chambers. Blood is pumped from the heart to the gills, where it receives oxygen and gets rid of carbon dioxide. Blood then moves on to the organs of the body, where nutrients, gases, and wastes are exchanged. However, there is no division of the circulation between the respiratory organs and the rest of the body. That is, the blood travels in a circuit which takes blood from heart to gills to organs and back to the heart to start its circuitous journey again.\n\nFrogs have a three-chambered heart, consisting of two atria and a single ventricle. Blood leaving the ventricle passes into a forked aorta, where the blood has an equal opportunity to travel through a circuit of vessels leading to the lungs or a circuit leading to the other organs. Blood returning to the heart from the lungs passes into one atrium, while blood returning from the rest of the body passes into the other. Both atria empty into the single ventricle. While this makes sure that some blood always passes to the lungs and then back to the heart, the mixing of oxygenated and deoxygenated blood in the single ventricle means the organs are not getting blood saturated with oxygen. Still, for a cold-blooded creature like the frog, the system works well. Humans and all other mammals, as well as birds, have a four-chambered heart with two atria and two ventricles. Deoxygenated and oxygenated blood are not mixed. The four chambers ensure efficient and rapid movement of highly oxygenated blood to the organs of the body. This has helped in thermal regulation and in rapid, sustained muscle movements.
197081
am·phib·i·an\nn. \nA cold-blooded, smooth-skinned vertebrate of the class Amphibia, such as a frog or salamander, that characteristically hatches as an aquatic larva with gills. The larva then transforms into an adult having air-breathing lungs. \nAn animal capable of living both on land and in water. \nAn aircraft that can take off and land on either land or water. \nA tracked or wheeled vehicle that can operate both on land and in water.
1178435
CLIMBING PERCH or walking fish, member of the labyrinth fish family, adapted to living in oxygen-depleted water or on dry land. It is not related to the true perch. Labyrinth fishes are spiny-finned fishes of Africa and SE Asia, which have a labyrinthine chamber over the gills that enables them to absorb and retain atmospheric oxygen. Members of some species can remain out of water for several days and will even suffocate (drown) if held underwater. The climbing perch, Anabas testudineus, of SE Asia, is brown and reaches a length of 10 in. (25 cm). Climbing perches travel in search of water when their ponds dry up; they walk with jerky movements, supported by the spiny edges of the gill plates and propelled by the fins and tail. They are said to climb low trees. The family also includes the paradise fishes , the betta , and the gourami ; all are popular aquarium fishes. The land-walking mudskipper is of a different family. Climbing perches are classified in the phylum Chordata , subphylum Vertebrata, class Osteichthyes, order Perciformes, family Anabantidae.
607243
Flatworms and roundworms are as different as frogs and snakes. Or perhaps less different when we forget the science part of it.Flat worms hape a flat body, like tape.And they do not have a coelom. What is a coelom? If you cut open a higher animal (eg. a mouse)you will find that their body is like a hollow bag filled with liquids and organs. The empty space of the body in which these organs lie and which is filled up of body fluids is called coelom. In flat worms, this entire space is filled with compact tissue.Sexes are not separate and specialised cells called flame cells are responsible for excretion. In round worms, the coelom exists but is actually pseudocoelom or "false coelom". This means patches of tissue are present scattered in the coelom. Sexes are separate ie. males and females are separate. Moreover an excretory tube is responsible for excretion instead of flame cells.
712858
I like a very broad question.  Arachnids and crustaceans both shed exoskeletons as they grow.  The arachnids are generally land creatures comprising of spiders, scorpions etc.  Crustaceans comprise of crabs, shrimp, prawns, crayfish, lobster etc.  There are a number of crustaceans that live on land but require water to breed.  The land crab is an example of one.  They also need to shed exoskeletons.\nExoskeletons are what holds there bodies together as they have no internal skeletons.  So as the animal grows, the skin needs to be shed.\nThe arachnid need little water, gathering what they need from the animals that they eat.  The exoskeleton also reduces water lose for those that live in deserts.\nCrustaceans have evolved to live in both fresh and salt water, so the adaptations are to numerous to list.  I hope I have given you a few clues for further investigation.
56609
They don't swallow the water, per se - they simply swim and let the water flow past their gills.  As the water flows throughout the network in their gills, the oxygen that's dispersed throughout the water enters their bloodstream, thus enabling the fish to breathe underwater!\n\nThis is why when one purchases a fish tank, one has to get an oxygen supplier as well - no fish can survive in just standing water for long!