Plant tissues

• What should you be able to describe by the end of the video?

  The roles of different tissues in a plant
• Why is it important to learn the details in this video?

  It is likely to be on your exam
• Where does photosynthesis take place in plants?

  In leaves
• What is the leaf classified as in plant anatomy?

  A plant organ
• What type of cells cover the top and bottom of the leaf?

  Epidermal cells
• What is the function of the epidermis in a leaf?

  It protects the surface of the leaf
• What is a key adaptation of the upper epidermis?

  It is transparent to allow light passage
• What does the waxy cuticle do for the leaf?

  Reduces water evaporation from the leaf
• What are the tiny pores on the lower epidermis called?

  Stomata
• What is the function of stomata?

  Allow gas exchange in the leaf
• What do guard cells do?

  Control the opening and closing of stomata
• What is found at the top of the leaf?

  The palisade mesophyll
• What do palisade cells contain that is crucial for photosynthesis?

  Chloroplasts
• What is the key feature of the spongy mesophyll?

  It is full of air spaces
• How does carbon dioxide move in the leaf?

  From stomata through spongy mesophyll to palisade cells
• What does xylem tissue transport?

  Water and dissolved mineral ions
• What is the role of magnesium in plants?

  It is used to make chlorophyll
• What does phloem tissue transport?

  Dissolved sugars from leaves to the plant
• What is the process of moving sugars through phloem called?

  Translocation
• What is meristem tissue responsible for?

  Growth and differentiation of plant tissues
• Where is meristem tissue found?

  At growing tips of shoots and roots
• What do stem cells in meristem tissue do?

  Differentiate into various plant tissues
• What should you expect in the upcoming video?

  More details on stomata and guard cells
• What are the different tissues found in a leaf and their roles?

  • Epidermal tissue: Protects leaf surface
  • Palisade mesophyll: Contains chloroplasts for photosynthesis
  • Spongy mesophyll: Allows gas diffusion
  • Xylem: Transports water and minerals
  • Phloem: Transports sugars
  • Meristem: Growth and differentiation
• What are the adaptations of the upper epidermis and the waxy cuticle?

  • Upper epidermis: Transparent for light passage
  • Waxy cuticle: Reduces water evaporation
• How do stomata and guard cells function in gas exchange?

  • Stomata: Allow CO2 in and O2 out
  • Guard cells: Control stomata opening and closing