Explain the importance of irritability in organisms.

Irritability – the ability of living organisms to respond to changes in the external environment, is an integral property of living things. Only if this sign is present, it can be determined that the organism is alive. In the simplest organisms and plants that do not have a nervous system, irritability performs its function. It allows you to avoid negative environmental influences and to adapt to them. At the same time, physiological and physicochemical processes change in the body.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.