Are Osteichthyes endothermic or ectothermic?
Osteichthyes, or bony fish, are ectothermic, meaning they are cold-blooded.
Are hagfish endothermic or ectothermic?
They have a complete backbone; they have jaws; their endoskeleton is made of cartilage; they are ectothermic.
What are the characteristics of Osteichthyes?
Class Osteichthyes includes all bony fishes. Like all fishes, Osteichthyes are cold-blooded vertebrates that breathe through gills and use fins for swimming. Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils.
What are the characteristics of cartilaginous fish?
Other characteristics of cartilaginous fish include:
- Paired fins.
- Paired nostrils.
- Scales.
- Two-chambered hearts.
- Skeletons made of cartilage rather than bone. Cartilage is supportive tissue that does not have as much calcium as bones, which makes bones rigid. Cartilage is softer and more flexible than bone.
Is Aves endothermic or ectothermic?
Members of Class Aves and Class Mammalia that is birds and mammals are endothermic animals/vertebrates. These organisms are able to maintain a steady body temperature.
Are class Aves ectothermic?
Reptiles and amphibians are ectotherms, while birds are endotherms. An ectotherm (reptile/amphibian) relies primarily on its external environment to regulate the temperature of its body. Endotherms (birds) are able to regulate their body temperatures by producing heat within the body.
Are Stingrays endothermic?
Sharks, stingrays, skates, eels, puffers, seahorses, clownfish are all examples of fishes. Marine mammals are a group of animals that can either partially or completely aquatic vertebrates that have lungs, have hair (at least at one point in their life), produce milk for live birth, and are endothermic.
Are pigeons endothermic?
Most of the mammals and bird species are warm-blooded animals. The whale is a mammal and pigeons and bats are birds. Thus, they are endothermic animals.
What does the operculum cover?
The operculum is a hard, plate-like, bony flap that covers the gills of a bony fish (superclass: Osteichthyes). It protects the gills and also serves a role respiration. Fish can acquire dissolved oxygen through pumping water over their gills by opening and closing their jaws and opercula.
What are the adaptive features of bony fish?
Bony fish have a special adaptation,that allows them to remain buoyant, or float on water. -They have a special organ called a swim bladder, which is under the layer of bony skeleton and filled with gas. -Bony fish are able to breathe without swimming through their Operculum.
What are the five main types of cartilaginous fish?
Classification
| Subclasses of cartilaginous fishes | |
|---|---|
| Elasmobranchii | Sharks and rays, skates, and sawfish |
| Holocephali | Chimaeras |
What kind of skin do cartilaginous fish have?
placoid scales
The skin of cartilaginous fish is protected by a covering of abrasive placoid scales, called denticles.