Fill in the table “Cellular structure of the stem”
November 13, 2020 | Education
| Layer | the cloth | Structure | Function |
Bark
(skin Bung) |
Covering | The skin is formed by one layer of cells with dense membranes (present only in young shoots).
The cork consists of several layers of dead, air-filled cells. Lentils are formed by large cells of the main tissue with large intercellular spaces |
Protection of deeper cells from damage, excessive evaporation of moisture, penetration of pathogens. Gas exchange is carried out through the lentils |
Bast | Conductive,
Storing, mechanical |
The inner part of the bark. Consists of sieve tubes, companion cells, storage cells and dead cells of mechanical tissue, which give strength to the bast | Conducting organic matter from leaves to root, storing nutrients |
Cambium | Educational | Formed by one layer of living narrow long cells with thin membranes | Cell division and stem growth in thickness |
Wood | Main,
conductive, mechanical |
It is formed by cells of various sizes and shapes: the vessels of the conductive tissue consist of dead cells with thickened walls. Wood fibers are made up of thick-walled cells | Conduction of water and minerals, support function |
Core | Main storage | Consists of large, thin-walled, loosely adjacent cells | Storing nutrients |
