Metabolism is a combination of various chemical transformations occurring in the body that ensure the growth and development of the body, its reproduction and constant contact with the environment.
Metabolism is one of the important signs of life: with the cessation of metabolism, the life of a plant stops.
In a plant organism, photosynthesis and respiration proceed through numerous successive chemical reactions, in which some substances are converted into others.
So, in the process of photosynthesis from carbon dioxide and water obtained by the plant from the environment, sugars are formed, which are then converted into starch, fiber or proteins, fats and vitamins – substances necessary for the plant to feed and store energy.
In the process of respiration, on the contrary, the organic substances created in the process of photosynthesis are split into inorganic compounds – carbon dioxide and water. In this case, the plant receives the released energy.
These transformations of substances in the body are called metabolism.