Plant Tissues

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

  Roles of the different tissues in a plant
• What is the function of the epidermal tissue in a leaf?

  • Protects the surface of the leaf
  • The upper epidermis is transparent to allow light penetration
  • Covered with a waxy cuticle to reduce water evaporation
• What are the two types of epidermis found in a leaf?

  Upper epidermis and lower epidermis
• Why is the upper epidermis transparent?

  To allow light to pass through to the photosynthetic cells
• What is the purpose of the waxy cuticle on the leaf?

  To reduce evaporation of water from the leaf surface
• What are stomata and their function in a leaf?

  • Tiny pores on the lower epidermis
  • Allow carbon dioxide to enter and oxygen to leave
  • Help control water vapor loss
• What cells are found on either side of the stomata?

  Guard cells
• What is the role of palisade mesophyll in a leaf?

  • Contains palisade cells packed with chloroplasts
  • Chloroplasts absorb light energy for photosynthesis
• What is the key feature of spongy mesophyll in a leaf?

  • Full of air spaces
  • Allows diffusion of carbon dioxide to palisade cells
  • Allows diffusion of oxygen to stomata
• What is the function of xylem tissue in a plant?

  Transports water and dissolved mineral ions from the roots to the stem and leaves
• What is the role of phloem tissue in a plant?

  Transports dissolved sugars from the leaves to the rest of the plant
• What is the process called that describes the movement of sugars through phloem tissue?

  Translocation
• What is meristem tissue and where is it found?

  • Contains stem cells
  • Found at growing tips of shoots and roots
  • Can differentiate into different types of plant tissue
• What type of cells are found in meristem tissue?

  Stem cells
• Why is it important to learn about plant tissues for exams?

  Because they are likely to be on the exam