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Строение рыбы!! за 7 класс по теме Костные рыбы

Answer 1

Надо писать все органы?

Answer 2

Structure of Bony Fish

Bony fish, also known as Osteichthyes, are a diverse group of fish that have a skeleton made primarily of bone. They are the largest class of vertebrates, with over 30,000 species identified. Here is a detailed overview of the structure of bony fish:

1. External Anatomy: - Bony fish have a streamlined body shape, which helps them move efficiently through water. - They are covered in scales, which provide protection and reduce friction. - The head of a bony fish contains various sensory organs, such as eyes, nostrils, and a mouth with jaws and teeth. - The fins of bony fish are used for stability, maneuverability, and propulsion. They include the dorsal fin, caudal fin (tail fin), pectoral fins, and pelvic fins.

2. Internal Anatomy: - The internal anatomy of bony fish includes various organ systems. - The digestive system consists of a mouth, esophagus, stomach, and intestine for processing food. - Bony fish have a two-chambered heart that pumps oxygenated blood to the body and deoxygenated blood to the gills. - The respiratory system includes gills, which extract oxygen from water, and a swim bladder, which helps control buoyancy. - Bony fish have a well-developed nervous system, including a brain and sensory organs like eyes and lateral lines for detecting movement and vibrations in the water. - The reproductive system of bony fish varies, with most species exhibiting external fertilization.

3. Skeleton: - The skeleton of bony fish is primarily composed of bone, hence the name "bony fish." - The skeleton provides support and protection for the internal organs. - Bony fish have a skull that encloses and protects the brain. - The axial skeleton includes the vertebral column (spine) and ribs, while the appendicular skeleton consists of the paired fins and girdles that attach them to the body.

4. Classification: - Bony fish belong to the class Osteichthyes, which is further divided into two subclasses: Actinopterygii (ray-finned fish) and Sarcopterygii (lobe-finned fish). - Act