Plants
- 2. Plants are living things, so they need food. Unlike animals, plants make their own food. In order to do this, plants need: light air water mineral salts
- 3. Plant nutrition involves several processes: 1. Plants take in substances from the soil and from air. 3. Nutrients are transported inside plants. 2. Plants make their own food using sunlight. 4. Plants take in oxygen through respiration.
- 5. ▪Water + mineral salt = raw sap
- 6. Plants absorb water and mineral salts from the soil through their roots. The mixture of water and mineral salts is called raw sap. It travels up the stem to the leaves through tubes called xylem vessels. Plants take in carbon dioxide through tiny openings, called stomata, in the leaves. • Raw sap: savia bruta • Carbon dioxide: dióxido de carbono(CO2) • Xylem vessels: vasos leñosos • Stomata: estomas
- 7. 2. Plants make their own food
- 8. Raw sap combines with carbon dioxide and transforms into elaborated sap through PHOTOSYNTHESIS. This process needs sunlight, which is trapped by a green substance called chloropyll, found mainly in the leaves and stem. During photosynthesis, oxygen is released through the stomata.
- 10. Elaborated sap is distributed from the green parts of the plants through tubes called phloem vessels. The non-green parts of the plant are unable to carry out photosynthesis. • unable: incapaz • to carry out: realizar
- 13. Plants take in oxygen and release carbon dioxide through a process called respiration. Respiration takes place through the stomata. Plants combine oxygen with nutrients to produce energy for growth. Through , plants take in carbon dioxide and release oxygen during the day. Through , plants take in oxygen and release carbon dioxide day and night.
- 14. Plants produce more oxygen than they take in. Other living things use this oxygen to breathe, including humans.