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3 Types of Plant Cells 1. Parenchymal Cells Structure -thin cell wall -large central vacuole (contains stored food) -has lots of plastids (chloroplasts) Function -photosynthesis when light is present -food storage Example: -apples -most common and least specialized type of plant cell 2. Collenchyma Cells Structure -thick, stretchable cell walls -living cells Function -support the plant -found in areas that are growing rapidly Example: -strings in a celery stalk 3. Sclerebchymal Cells Structure -thick, non-stretchable cell walls -usually dead at maturity Function: -support the non-growing parts of a plant Example: Outer covering of seeds and nuts -stem and leaf veins