Peixes: Vertebrates of the Water

Qual é o processo de reprodução dos peixes?

O que os peixes ósseos usam para respirar?

Quais são os dois grupos de peixes condríctes?

Em que período os peixes evoluíram?

Os peixes ósseos são divididos em quantos grupos?

Quais são as duas principais características dos peixes?

Onde os peixes são encontrados?

O que acontece durante o processo de desova?

O que acontece durante o processo de troca de oxigênio e dióxido de carbono?

Quando os peixes evoluíram?

Peixes are vertebrates that live in water and have a body covered in scales.
Peixes have a respiratory system that uses gills.
Peixes are found in both salt and fresh water, and have evolved over 530 million years ago during the Devonian period.
Peixes reproduce through a process called desova. During desova, the female releases her eggs into calm water and the male then releases his sperm onto the eggs.
Osteichthyes, or fish with well-formed bones, are divided into two groups: those with smooth barbatanas and those with spiny barbatanas.
Condríctes, or fish without bones, are divided into two groups: those with lungs and those without lungs.
Peixes ósseos breathe using gills, while cartilaginosous fish breathe through gills that do not have an opérculo and are organized into five or seven pairs.
A continuous current of water enters through the mouth and bathes the gills for a fraction of a second, while the opérculo remains attached to the trunk, closing the passage to the mouth.
The exchange of oxygen and carbon dioxide happens while the water is in contact with the gills.

Explore the world of Peixes, the vertebrates living in water with scales and a respiratory system that uses gills. Learn about their evolution, reproductive process, and the unique characteristics of Osteichthyes and Condríctes.