Table of Contents
- 1 Which type of caudal fin is present in osteichthyes?
- 2 Do Chondrichthyes have side fins?
- 3 What is the biggest difference between Class chondrichthyes and Osteichthyes?
- 4 Do Osteichthyes have gills?
- 5 What are the characteristics of Osteichthyes?
- 6 What are the key distinguishing features between the bony fish Osteichthyes and the cartilaginous fish Chondrichthyes )? Quizlet?
Which type of caudal fin is present in osteichthyes?
Comparison with cartilaginous fishes
| hideComparison of cartilaginous and bony fishes | ||
|---|---|---|
| Characteristic | Sharks (cartilaginous) | Bony fishes |
| Exoskeleton | Separate dermal placoid scales | Overlapping dermal cosmoid, ganoid, cycloid or ctenoid scales |
| Endoskeleton | Cartilaginous | Mostly bony |
| Caudal fin | Heterocercal | Heterocercal or diphycercal |
Do Chondrichthyes have side fins?
Species in this class have paired fins, hard scales, a two-chambered heart, and a pair of nostrils. Sharks have fins on their back, sides, and stomachs. The fins on their back are called dorsal fins. Some species have one dorsal fin and others have two dorsal fins.
What characteristics are specific to osteichthyes Chondrichthyes?
| Characters | Chondrichthyes | Osteichthyes |
|---|---|---|
| Endoskeleton | Cartilaginous endoskeleton | Bony endoskeleton |
| Size | Large body | Smaller in size compared to Chondrichthyes |
| Position of mouth | Ventrally | Terminal |
| Scales | Placoid scales are present | Cycloid scales are present |
What are the key distinguishing features between the bony fish Osteichthyes and the cartilaginous fish?
Difference Between Bony Fish and Cartilaginous Fish
| Bony Fish | Cartilaginous Fish |
|---|---|
| Class: Osteichthyes or Teleostomi. | Class: Chondrichthyes. |
| They are both fresh water as well as marine. | They are marine. |
| Endoskeleton is made up of bone. | Endoskeleton is made up of cartilage. |
| They have 4 pairs of gills. | They have 5-7 pairs of gills. |
What is the biggest difference between Class chondrichthyes and Osteichthyes?
The main difference between Chondrichthyes and Osteichthyes is that the Chondrichthyes is the class of bony fish whose endoskeleton is made up of cartilages whereas Osteichthyes is the class of cartilaginous fish whose endoskeleton is made up of bones.
Do Osteichthyes have gills?
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 class Osteichthyes?
Key features of Osteichthyes
- Skeleton more or less bony, vertebrae numerous.
- Skin with mucous glands and embedded dermal scales.
- some without scales.
- Paired fins.
- Mouth with many teeth (some toothless).
- jaws present.
- Respiration by gills supported by bony gill arches and covered by a operculum.
How do Chondrichthyes differ from Osteichthyes?
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 key distinguishing features between the bony fish Osteichthyes and the cartilaginous fish Chondrichthyes )? Quizlet?
-Osteichthyans have bony skeletons, chondrichthyans have skeletons made of cartilage. -Osteichthyans have a covering over their delicate respiratory organs, the gills called an operculum, chondrichthyans have open gill slits.
How do the number and shape of fins of a bony fish differ from those of a shark?
How do the number and shape of fins of a bony fish differ from those of a shark? Fins of a bony fish are flexible and diverse in shape. Describe the location of a fin present in bony fish but not in sharks. How does the symmetry of the tail of a fish compare with that of a shark?