Are Eels Ray Fin Fish?

Are Eels Ray Fin Fish? The actinopterygians, or ray-finned fish, are one of the two major clades of bony fish (Osteichthyes), the other being the lobe-finned fish, or Sarcopterygians. The Chondrichthyes (cartilaginous fish) are the extant sister clade of the Osteichthyes. Which one is an example of a ray-finned fish? The ray-finned fishes include some

Are Fish Unidirectional Breathing Or Bidirectional?

Are Fish Unidirectional Breathing Or Bidirectional? (a) Fish have the simplest circulatory systems of the vertebrates: blood flows unidirectionally from the two-chambered heart through the gills and then the rest of the body. What is unidirectional flow in fish? With unidirectional flow, there is no mixing. Another factor is the countercurrent movement of blood and

Can Fish Breathe Through Gills?

Can Fish Breathe Through Gills? Fish breathe with their gills, and they need a constant supply of oxygen. Gills sit under the operculum. This is called the gill slit. What animals can breathe through gills? Animals that live in water breathe through gills with very few exceptions. Aquatic animals with gills include fish, prawns, amphibians,