Tissues in Physiology

Intercellular Matrix

• The intercellular matrix is the substance that fills the space between cells in multicellular organisms.

Characteristics of Meristematic Tissues

• Meristematic tissues in plants are undifferentiated cells that retain the ability to divide and differentiate into different cell types.
• They are found in regions of the plant where growth occurs, such as the tips of shoots and roots.

Tissues in Unicellular Organisms

• Unicellular organisms lack tissues because they are single-celled organisms.

Functions of Tissues in Multicellular Organisms

• Tissues perform specific functions in multicellular organisms, such as providing structural support, transporting materials, and protecting the organism.

Specialized Tissues in Plants

• Plants that have specialized tissues capable of regulating an organism's response to its environment include flowering plants and conifers.

Characteristics of Meristematic Tissue

• The main characteristic of meristematic tissue in plants is the ability of its cells to divide and differentiate into different cell types.

Functions of Dermal Tissue

• Dermal tissue in plants provides a protective outer layer that prevents water loss and protects the plant from pathogens and insects.

Location of Meristematic Tissues

• In dicotyledonous trees and shrubs, meristematic tissues are found in the cambium layer, just beneath the bark.

Role of Trichomes

• Trichomes are hair-like structures found on the surface of plants that help to reduce water loss and protect the plant from insects and pathogens.

Functions of Ground Tissue

• Ground tissue in plants provides structural support and storage for the plant.

Functions of Vascular Tissue

• The main function of vascular tissue in plants is to transport water, nutrients, and sugars throughout the plant.

Roles of Xylem and Phloem Tissue

• Xylem tissue transports water and minerals from the roots to the leaves.
• Phloem tissue transports sugars and other organic compounds produced by photosynthesis from the leaves to the rest of the plant.

Purpose of Root Hairs

• Root hairs increase the surface area of the root, allowing for more efficient absorption of water and minerals from the soil.

Location of Apical Meristems

• Apical meristems are found at the tips of shoots and roots in plants.

Unique Feature of Trichomes

• Trichomes found on plants are unique in their ability to deter insects and other herbivores from feeding on the plant.