What is plant tissue

In biology, tissue is a collection of cells that have the same structure and perform one function. Animal and plant cells differ from each other. The tissues formed by them are also different.

When plants switched to a terrestrial lifestyle, a new stage in their evolution began. Organs began to form - parts of plants that perform different functions. According to the functions, cells began to specialize. So there were plant tissues.

The higher the step of the evolutionary ladder occupied by a particular plant, the more differentiated are its tissues. The most differentiated are the tissues of flowering plants.

All plant tissues can be divided into two groups: meristems (educational) and permanent tissues.

Meristems

Meristems are embryonic tissues. Their main task is to supply the plant with “building material” for its other tissues in the growth process. To perform this task, cells need to share, which they do throughout the life of the plant. The walls of these young cells are thin, the nuclei are large, and the vacuoles are small.

Distinguish between primary and secondary meristem.

The primary meristem forms a seed germ, and in an adult plant it remains at the tips of the roots and shoots, due to which these organs grow in length. The growth of roots and shoots in thickness, as well as the restoration of damaged organs provides a secondary meristem - pellogen and cambium.