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Jawless fish and cartilaginous fish have cartilaginous skeletons, and bony fish have skeletons made from bone. Cartilaginous fish and bony fish both have jaws, paired appendages, and whole vertebrae, and jawless fish lack jaws, paired appendages, and often are without whole vertebrae. Cartilaginous fish can have scales or be naked, jawless fish are naked, and bony fish have scales. Bony fish have swim bladders, and cartilaginous fish do not. Jawless fish, cartilaginous fish, and bony fish all have fins, gills, and dorsal nerve cords that lead to a distinct brain. They all also have postanal tails and notochords.
Jawless fish, like lampreys and hagfish, lack true jaws and have circular mouths with tooth-like structures. They also have cartilaginous skeletons and lack scales. Cartilaginous fish, like sharks and rays, have jaws with teeth, cartilaginous skeletons, and covered in dermal denticles or scales.
Jawless fish do not have paired appendages, but cartilaginous fish do. Cartilaginous fish can also have placoid scales or be naked, but jawless fish are always naked. Cartilaginous fish have strong jaws, but jawless fish have no jaw at all, hence their name. Jawless fish often do not have vertebrae, but cartilaginous fish always have vertebrae. Cartilaginous fish and jawless fish both, however, have gills, postanal tails, dorsal nerve cords that lead to a distinct brain, and notochords.
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What is the skeleton of a jaw less fish made of?
The skeleton of jawless fish, such as lampreys and hagfish, is primarily made of cartilage rather than bone. Cartilage is a flexible and lightweight tissue that provides structure and support to these fish without the need for heavy bones.
Are there more then 20000 Species of fish or less than 20000?
Yes there is more! There is 27,000 species of fish! That is amazing.
What is the scientific name of agnathans?
That is the scientific designation for " jaw-less fish. "
What kind of fish lives by the delta fresh water fish or salt water fish?
Both fresh water and salt water fish can live by a delta. Fresh water fish typically inhabit the river portions of the delta where the water is less saline, while salt water fish are more commonly found in the estuary and coastal areas where the water is more saline.
What is the difference between a female femur from a male?
The neck of the femur forms a shallower angle with the long axis of the femur bone in a female. Forensic anthropologists have found differences in the measurements of the transverse width and length of the head of the femur between the sexes, and have posulated this application in identifying sex of dismembered murder victims; however, there are significant differences between races also. The femur bone has many raised rough portions, and protubernces for the attachment of muscles, these are usually larger in males due to the greater pull of the attached muscles which are larger.
Are sharks jaw less fish?
No, sharks are not jawless fishes. They are Cartilaginous fishes
What is Bony Fishes?
A bony fish is a fish that has a skeleton made of bone, with less cartilage than a cartilaginous fish. All bony fish can breathe both salt and fresh water. A good example of that is the Pacific salmon.
What do cartilaginous joints do?
Cartilaginous joints are connected entirely by cartilage (fibrocartilage or hyaline).[1] Cartilaginous joints allow more movement between bones than a fibrous joint but less than the highly mobile synovial joint. An example would be the joint between the manubrium and the sternum. Cartilaginous joints also form the growth regions of immature long bones and the intervertebral discs of the spinal column.
Are shark fins sharp or dull looking?
Well, the sharks fins are not sharp. they are made of cartilage which the shark is mostly made of. Cartilage is what is in your nose and your ears. That is why they bend so easily. Not many fish have cartilage inside them. The fish that do are called, you guessed it, cartilaginous fish. There is also bony fish and jaw-less fish.
Do freshwater and saltwater fish have the same body parts?
Yes. If you wish to get extremely picky they have fundamental differences but basically all fish are more or less the same.
What are some differences between the Inca and Aztec?
The Incas were less violent then the Aztecs
What differences are there between German children?
No more or less than there'd be between children of any nationality.
Why there are differences between svr09Wii and the others versions of other consoles?
idon't know for certain . but there are less matches, less characters, but you can pick what they do.
What three classes of animals are often grouped together as fish?
The three classes of fish are (scientific name/common name): Agnatha/Jawless or No Jaw Chondrichthyes (chon-dri-ik-thees)/Cartilaginous (cart-e-la-ga-nis) Osteichthyes (os-t-ik-thees)/Bony Pronunciation in parenthesis
What is the difference between a sick fish and a healthy fish?
sick fish loose their color they swim less they hide they stay at the corner they stay at the top or bottom of the tank
Differences between organic LED and LCD?
There are quite a number of differences between organic LED and LCD. Some of the differences include illumination which is better in LED, LED consumes less power and also has light emitting diodes as the main component among others.
What are some differences between a forklift and a car?
Forklifts are heavier, less stable and more dangerous. Cars are faster.
