CBSE Class 9 Answered

Parenchyma cells can be categorised based on their structure, location and functions performed. The main parenchyma tissues are:

Chlorenchyma: Cells which have chloroplast and perform photosynthesis. Transfer Cells: They play an important role in the transport of solutes over short distances. Phloem Parenchyma: It stores food and other materials like resins, latex and mucilage. Xylem Parenchyma: It stores food materials like starch, fats and other substances such as tannins and crystals. Storage Parenchyma: These store various substances like water, starch, proteins etc. They act as a food and water reservoir. Prosenchyma: These are fibre-like elongated cells, which are thick-walled and provide rigidity and strength to the plant. Aerenchyma: They contain very large intercellular spaces. These are present in aquatic plants. Epidermis Parenchyma: It is found in the epidermis of the leaves of some gymnosperms. Conjunctive Parenchyma: This type of parenchyma is present in the root system.