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Chapter 2 – Plant Structures and Functions

Chapter 2 – Plant Structures and Functions. Lesson 3 – Photosynthesis & Respiration. What do leaves do?. A leaf makes food (sugar) for the plant. To make food, a leaf needs two things: water carbon dioxide. CO 2. What do leaves do?.

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Chapter 2 – Plant Structures and Functions

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  1. Chapter 2 – Plant Structures and Functions Lesson 3 – Photosynthesis & Respiration

  2. What do leaves do? • A leaf makes food (sugar) for the plant. • To make food, a leaf needs two things: • water • carbon dioxide CO2

  3. What do leaves do? • A leaf gets water through veins (narrow tubes containing xylem). • A leaf gets carbon dioxide (CO2) through stomata (tiny holes in the bottom ofthe leaf).

  4. Food Making • Plants make food through a process called photosynthesis. • The process takes place in chloroplasts, which are just below the epidermis(outer layer of the leaf).

  5. Food Making • The Photosynthesis Equation: • Carbon dioxide + water + sunlight = sugar andoxygen

  6. What is the photosynthesis and respiration cycle? • In photosynthesis, plants release oxygen. • Animals take in oxygen and release carbon dioxide. • Plants take in thecarbon dioxide, andthe cycle starts over.

  7. What is the photosynthesis and respiration cycle? • When animals breathe in oxygen, it releases, or unlocks, the energy stored in food. This is called respiration.

  8. What is the photosynthesis and respiration cycle? Photosynthesis and Respiration Video

  9. Public domain carbonation image courtesy of Wikimedia Commons. All other images courtesy of Microsoft Office Online.

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