Question

Определи верную характеристику нервной системы Моллюсков. лестничного типа разбросанно-узлового типа в виде окологлоточного кольца и брюшной цепочки диффузного типа

Answer 1

Нервная система моллюсков разбросанно-узлового типа, состоит из окологлоточного нервного кольца

Answer 2

Characteristics of the Nervous System in Mollusks

The nervous system in mollusks can vary in its organization and structure depending on the specific species. Here are the characteristics of the nervous system in different types of mollusks:

1. Ladder-Like (Ladder-Type) Nervous System: This type of nervous system is found in some mollusks, such as flatworms (Platyhelminthes). It is characterized by a series of longitudinal nerve cords that run along the body, interconnected by transverse nerves. This arrangement resembles a ladder, hence the name "ladder-like".

2. Scattered-Nodal (Scattered-Node) Nervous System: Some mollusks, like the sea anemone Condylonucula maya, have a scattered-nodal nervous system. In this type, nerve cells are dispersed throughout the body, forming nodes or ganglia. These ganglia are interconnected by nerve fibers, allowing for communication and coordination between different parts of the body.

3. Ring-Like (Ring-Type) and Ventral Chain Nervous System: Another type of nervous system found in mollusks is the ring-like or ventral chain nervous system. This arrangement is seen in organisms like annelids (segmented worms) and some mollusks. It consists of a nerve ring or collar around the pharynx (throat) and a ventral nerve cord that runs along the length of the body. The ventral nerve cord is composed of ganglia or nerve clusters connected by nerve fibers.

4. Diffuse Nervous System: Some mollusks, such as certain types of jellyfish, have a