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Unit 3 Lesson 4 Transpiration and Translocation Systems

Unit 3 Lesson 4 Transpiration and Translocation Systems. How do Plants Absorb and Transport Materials?. Step 1 : Roots have tiny hairs covered with thin membranes that allow water and nutrients to enter.

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Unit 3 Lesson 4 Transpiration and Translocation Systems

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  1. Unit 3Lesson 4Transpiration and Translocation Systems Unit 3, Lesson 4, Transpiration and Translocation

  2. How do Plants Absorb and Transport Materials? • Step 1: Roots have tiny hairs covered with thin membranes that allow water and nutrients to enter. • Osmosis is the movement of water from an area of higher water concentration to an area of lower water concentration. • Water enters the roots until the concentration in the root is equal to the concentration outside the root. • The water entering the root also carries substances (nutrients) Unit 3, Lesson 4, Transpiration and Translocation

  3. How do Plants Absorb and Transport Materials? • Step 2: After absorption by the roots, water is passed from cell to cell until it reaches the xylem. • Xylem is tissue, formed as tubes, that conducts water up the stems and to the leaves. • The petiole of the leaf takes the water from the xylem in the stem of the leaf veins, which distribute it throughout the leaf. ***Remember…xylem move nutrients UP! Unit 3, Lesson 4, Transpiration and Translocation

  4. How do Plants Absorb and Transport Materials? • Step 3: Leaves loose water by transpiration. • Transpiration occurs through tiny stomata (microscopic pores on the underside of leaves. • Transpiration creates somewhat of an upward pull that assists the xylem in moving water and nutrients. ***Remember, translocation is the movement of sugars from the leaves through the phloem. Unit 3, Lesson 4, Transpiration and Translocation

  5. How do Plants Absorb and Transport Materials? • Step 4: Manufactured food (created by plant) is sent back out from the leaves, through the stems, and down to the roots in the phloem tissue. • Phloem is the tissue, or plant tubing, that allows sugars, proteins, hormones, dissolved materials, and salts to move from the leaves to the other parts of the plant. • Phloem are composed of sieve cells, which when hooked end to end, create a tube for transport. ***Remember, phloem carries sugar products back down Unit 3, Lesson 4, Transpiration and Translocation

  6. Stomata Unit 3, Lesson 4, Transpiration and Translocation

  7. Xylem and Phloem in a plant stem • Xylem on inside • Phloem on outside Unit 3, Lesson 4, Transpiration and Translocation

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