The body of the seated hydra was touched with a straw. The hydra changed its shape – it became short and thick.

The body of the seated hydra was touched with a straw. The hydra changed its shape – it became short and thick. One small area is disturbed, and in response the entire body has contracted. What is the name of this hydra reaction? What is its reason?

Reflex. The signal received by just one cell is distributed throughout the entire neural network.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.