Anatomy of Flowering Plants

Epidermal Tissue System in Plants

• The epidermal tissue system is the outermost layer of the primary plant body, protecting the plant from water loss, pathogens, and mechanical damage.
• It is composed of epidermal cells, trichomes, and root hairs.

Components of the Epidermal Tissue System

• Epidermal cells: tightly packed, flat, and rectangular cells that form the outer layer of the plant.
• Trichomes: hair-like structures that provide defense against herbivores and reduce water loss.
• Root hairs: thin, hair-like extensions of root epidermal cells that increase the surface area for water and nutrient absorption.

Functions of Trichomes

• Provide defense against herbivores and insects.
• Reduce water loss by creating a barrier to water evaporation.
• Shade the surface of the plant, reducing temperature and transpiration.

Role of Root Hairs

• Increase the surface area for water and nutrient absorption, enhancing the plant's ability to absorb nutrients.
• Improve the plant's ability to anchor itself in the soil.

Ground Tissue System in Plants

• The ground tissue system is composed of parenchyma, collenchyma, and sclerenchyma cells.
• It performs functions such as storage, support, and photosynthesis.
• It is the tissue system that provides the plant's internal structure and supports the plant's growth and development.