Plant Tissue - Leaving Cert - Revision Notes - Biology

Tissue Definition

• A group of similar cells that have a similar function.
• Three main types of plant tissue:
  1. Dermal tissue
  2. Ground tissue
  3. Vascular tissue

1. Dermal Tissue

• Function: Protects the surface of plants.
• Covers the entire plant from roots to leaves and flowers.

Revision Question

• Primary role of dermal tissue?
  • Protects plant surfaces

2. Ground Tissue

• Fills the inside of a plant.
• Function depends on location.
• Functions include:
  • Food storage (in roots/stems)
  • Photosynthesis (in leaves)

Revision Question

• One function of ground tissue?
  • Food storage

3. Vascular Tissue

• Function: Transports materials around the plant.
• Two types of vascular tissue:
  1. Xylem:
     • Transports water and minerals from roots to aerial parts of the plant
     • Movement is always upwards
  2. Phloem:
     • Transports food (sugar and nutrients) around the plant
     • Movement can be upwards or downwards

Exam Focus

• Name a type of plant tissue and its adaptation:
  • Dermal tissue has a thickened cell wall.

Revision Question

• Primary role of phloem?
  • Transport food in plant

The Leaf

• Dermal Tissue = Epidermal Tissue
• Vascular Tissue = Xylem and Phloem
• Ground Tissue = Mesophyll Tissue
• Stomata: Openings for gas exchange
• Photosynthesis occurs in ground tissue; light passes through transparent dermal tissue to reach it.
• Photosynthesis: Process by which plants use sunlight, carbon dioxide, and water to produce glucose and oxygen.

Revision Question

• Role of stomata in leaves?
  • Gas exchange during photosynthesis

Additional Resources

• Explore quizzes, flashcards, and questions on the topic.