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Chapter 24 Plant Anatomy and Nutrient Transport

Chapter 24 Plant Anatomy and Nutrient Transport - Chapter...

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Chapter 24 Plant Anatomy and Nutrient Transport Vocabulary annual ring apical meristem – located at the ends of roots and shoots for outward growth bark – made up of phloem, cork and cork cambium blade – broad flat portion of a leaf, contains vascular bundles or veins bulk flow – moves fluids up the xylem cambium Casparian strip – fatty waterproof material that prevents water from traveling through cell walls between endodermal cells ie. directs water flow cohesion-tension theory – water is pulled up the xylem, powered by transpiration. Water molecules stick together well so the entire water chain is pulled up the xylem as evaporation occurs collenchyma – elongated polygonal cells alive at matrity but do not divide. Provides support for young growing stems. companion cell – nourish sieve tube elements one for one cork cambium – lateral meristem layer that replaces the epidermis during secondary growth cork cell - form the protective outer layer of the bark of trees, tough waterproof protection cortex – tissue that converts sugars to starches, also stores carbohydrates cuticle – waxy substance often covering the above ground epidermis dermal tissue system – covers the outer surfaces of the plant body. Two types, epidermal and periderm – replaces epidermis as a plant matures differentiated cells – Cells that cannot divide and become part of the nongrowing portions of the plant body. Endodermis – cylinder of vascular tissue in a root epidermal tissue – forms the epidermis, outermost cell layer covering the leaves, stems, and roots of young plants. Also covers flowers, seeds and fruit epidermis – outermost layer of tissue fibrous root system – secondary roots replacing the primary root ground tissue system – makes up the body of most young plants. Provide photosynthesis, support, and storage. guard cell – regulates opening size of stomata heartwood – inner ‘old’ layer of xylem contributes strength herbaceous plant lateral meristem – form cylinders parallel to root and stem systems for width growth leaf – major photosynthetic structure of plants.
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