Name the region in which parenchyma tissue is present

Cell Types Make a thin section of a celery petiole or the main celery stalk. This needs to be very thin to see the features you are looking for, so make a few samples to look at! If you would like to stain your specimen, place the specimen on a slide and add a small drop of Toluidine Blue. Wait a few seconds for the dye to penetrate into the sample, then rinse by adding water to the slide and either soaking up or draining off the excess liquid. When the water is mostly clear, add another drop or two of water and a coverslip. Figure \(\PageIndex\): Phloem Tissue In the image above, you can see clusters of thick walled fibers, large open sieve tube elements, and small companion cells containing nuclei. Draw a cross section of the celery petiole, labeling parenchyma in the epidermis, collenchyma in the cortex, and sclerenchyma in the vascular tissue. Make notes about the differences in the cell wall for your future study. The central region of the celery petiole is called the pith. What type of cells are present in this region? While collenchyma tissue tends to have one job--flexible support--parenchyma and sclerenchyma can fill a diverse set of roles. In a developing pear, there is a high density of a second type of sclerenchyma cells called sclereids (the first type of sclerenchyma cells were fibers) . These cells cause young pears to be tough and unpalatable, as the seeds inside are still developing. As the seeds mature, the pear ripens, making more parenchyma cells for st...