Classification Of Plant Tissues — a labelled NEET Biology diagram with a definitions lexicon.
Classification of Plant Tissues Labelled parts: Plant tissues, Meristematic tissue, Apical meristem, Intercalary meristem, Lateral meristem, Permanent tissue, Simple permanent tissue, Parenchyma, Collenchyma, Sclerenchyma, Complex permanent tissue, Xylem, Phloem, Fibres, Sclereids, Tracheids, Vessels, Xylem parenchyma, Sieve tube elements, Companion cells, Phloem fibres, Phloem parenchyma. A type of plant tissue composed of actively dividing cells that are responsible for primary and secondary growth. These cells are undifferentiated and capable of forming various specialized tissues. FYI: Meristematic tissues are the source of all plant growth; their activity is essential for increasing the length (primary) and girth (secondary) of the plant. The meristem located at the tips of the roots and shoots (shoot apex and root apex). It is responsible for primary growth, leading to the increase in length of the plant. FYI: The shoot apical meristem (SAM) is responsible for generating leaves, stems, and flowers, while the root apical meristem (RAM) is responsible for root elongation. A meristematic tissue found at the nodes of grasses and some other monocots. It is responsible for the rapid regrowth of the plant after grazing or cutting. FYI: The presence of intercalary meristems allows grasses to quickly regenerate their leaf blades, a key adaptation for survival in grazing environments. Meristems responsible for secondary growth, leading to the increase in the girth or diameter of the plant stem and root. Examples include the vascular cambium and cork cambium. FYI: The vascular cambium is crucial because it produces secondary xylem (wood) and secondary phloem, enabling the plant to support larger structures over time. A type of simple permanent tissue composed of loosely packed, thin-walled cells with large intercellular spaces. These cells are primarily involved in storage and basic metabolic functions. FYI: Parenchyma tissue is metabolically active and is often found in the pith of stems and the cortex of roots, serving as a storage site for starch and water. A type of simple permanent tissue found beneath the epidermis in young stems and petioles. Its cells are characterized by uneven thickening of the cell walls, providing mechanical support and flexibility. FYI: Collenchyma provides flexible support to growing parts of the plant, allowing them to bend without breaking, unlike the rigid support provided by lignified sclerenchyma. A type of supporting tissue composed of cells with thick, lignified secondary walls. These cells are often dead at maturity and provide mechanical strength to plant parts. FYI: Sclerenchyma cells are responsible for the hardness found in coconut husk and nut shells. Living parenchyma cells found in the radial plates of the xylem tissue. They function primarily in the storage of food materials and water. FYI: Unlike tracheids and vessels, xylem parenchyma cells are alive and contribute to the metabolic activity of the xylem. Living parenchyma cells located in the phloem tissue. Their main role is the storage of food materials, particularly starch, and lateral transport of substances. FYI: Phloem parenchyma cells are crucial for the storage and lateral movement of sugars (sucrose) within the phloem.