BALIQLAR (PISCES) KATTA SINFI UMUMIY TAVSIFI VA SISTEMATIKASI
Keywords:
Fishes (Pisces), vertebrates, adaptation to aquatic environment, jawless fishes (Agnatha), bony fishes (Osteichthyes), injuries, egg laying, circulatory system, nervous system, lateral line organ, ecological importance, evolution, biodiversity, food chain, aquatic ecosystems.Abstract
Fish (Pisces) are a large class of aquatic vertebrates, whose organism is
adapted to the aquatic environment. Representatives of this class are distinguished by the
aerodynamic shape of their bodies, breathing through wounds, a single-stage circulatory
system, and reproduction by laying eggs. Fish are mainly divided into three groups: jawless
fish (Agnatha), cartilaginous fish (Chondrichthyes) and bony fish (Osteichthyes). Each
group has its own morphological and physiological characteristics. As an important part of
the ecological system, fish occupy a central place in the food chain and are of great
importance to mankind as a food and economic resource. Research in this class contributes
to the understanding of current issues related to fish evolution, biological adaptation, and
the maintenance of balance in aquatic ecosystems.
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