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Plant Nutrition Processes - Absorption, Photosynthesis, Respiration, Distribution, Waste Elimination

Learn about the different processes involved in plant nutrition, including the absorption of water and mineral salts, carbon dioxide absorption, photosynthesis, respiration, substance distribution, and the elimination of waste matter.

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Plant Nutrition Processes - Absorption, Photosynthesis, Respiration, Distribution, Waste Elimination

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  1. UNIT2 The nutrition function PLANTNUTRITION PROCESSES Natural Science 2. Secondary Education

  2. UNIT2 Plant nutrition processes 3. SUBSTANCE DISTRIBUTION 4. ELIMINATINGWASTE MATTER 1. OBTAINING NUTRIENTS 2. RESPIRATION 1cPhotosynthesis 1bCarbon dioxide (CO2) absorption 1aThe absorption of water and mineral salts Click on eachprocess tofind out more Natural Science 2. Secondary Education

  3. UNIT2 Plant nutrition processes 1a. The absorption of water and mineral salts • Plants absorb water containing dissolved mineral salts from the soil. • This is done through cells located at the end of the roots, calledroot hairs. • The mixture of water and minerals absorbed by the roots is calledxylem sap. Roothairs Water andmineral salts Xylem sap Go back to the Start menu Natural Science 2. Secondary Education

  4. UNIT2 Plant nutrition processes 1b. Carbon dioxide (CO2) absorption • Carbon dioxide enters the plant mainly through very small pores called stomata, which are found on the underside of the leaves. CO2 Location of the stomata on the leaf Stoma Go back to the Start menu Natural Science 2. Secondary Education

  5. UNIT2 Plant nutrition processes 1c. Photosynthesis • Photosynthesis takes place in the chloroplasts, which are located in the green parts of a plant. • The water and carbon dioxide absorbed by the plant reach the chloroplasts and, with the energy from sunlight, are transformed into carbohydrates. Oxygen is produced as a by-product. • The carbohidrates mix with the water in the leaf and formphloem sap. Solar energy Xylem sap Water and carbohydrates (phloem sap) Chloroplast Go back to the Start menu H2O + CO2 O2 Natural Science 2. Secondary Education

  6. UNIT2 Plant nutrition processes 2. Respiration • Plants are constantly respiring. This process is carried out by the mitochondria. • The plant absorbs oxygen through the stomata and the root hairs. • This oxygen reaches the mitochondria, where it is used to get energy from carbohydrates. • CO2and water are released. Oxygen Carbon dioxide Energy Carbohydrates Water Go back to the Start menu Natural Science 2. Secondary Education

  7. UNIT2 Plant nutrition processes 3. Substance distribution • Substances in the plant are transported through tube-shapedvessels which run along the stem, the branches and the leaf veins. • Some vessels take thexylem sapfrom the roots to the green parts of the plant. • Others distribute thephloem sap throughout the plant. Xylem sap Phloem sap Go back to the Start menu Natural Science 2. Secondary Education

  8. UNIT2 Plant nutrition processes 4. Eliminating waste matter • Plants eliminate waste in various ways: • The oxygen from photosynthesis, the carbon dioxide from respiration and excess water are eliminated through the stomata. • Plants store waste in the cells of old leaves and then they eliminate them. • They can also release substances like latex and resin through cuts in the stem. Stomata Water Carbon dioxide Oxygen Cut Old leaves Go back to the Start menu Natural Science 2. Secondary Education

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