Blood is a liquid consisting of mineral and organic substances, the purpose of which is the transfer of nutrients and oxygen, as well as thermoregulation, hormonal metabolism. Consists of blood cells: erythrocytes, leukocytes and platelets. Red blood cells are responsible for the transfer. Leukocytes are responsible for the body’s defense (immunity), platelets for blood clotting in the presence of damage in order to prevent blood loss. Evaporation (transpiration) protects plants from overheating and drying out.
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.