The red pathway (top) shows a pathway of water transport. Root sector in cross-section Epidermal cell Cortical parenchyma cell Casparian strip Endodermis Xylem vessel Root hair Pericycle Stele (Vascular cylinder) Epidermis Cortex

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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A. symplast

B. Apoplast

The red pathway (top) shows a ___ pathway of water transport.

**Root sector in cross-section**

- **Epidermal cell**: Outermost layer of cells in the root, where root hairs are located.
  
- **Cortical parenchyma cell**: Cells found in the cortex region, responsible for storing nutrients and aiding in the transport of substances.

- **Casparian strip**: A band of cell wall material in the endodermis, blocking passive water flow into the vascular cylinder.

- **Endodermis**: Innermost layer of the cortex, regulating water flow to the xylem.

- **Xylem vessel**: Conductive tissue responsible for transporting water and nutrients from roots to other parts of the plant.

- **Pericycle**: Layer of cells just inside the endodermis, surrounding the vascular cylinder.

**Root hair**: Hair-like structures that increase surface area for water absorption.

Arrows highlight two pathways:
- **Red line**: Indicates one pathway for water transport.
- **Blue line**: Indicates an alternative pathway.

Below the diagram:

- **Epidermis**: Outer layer of the root.
- **Cortex**: Middle layer, composed of parenchyma cells.
- **Stele (Vascular cylinder)**: Central part of the root containing xylem and phloem.

Understanding these structures and their roles in water transport is crucial for comprehending how plants absorb and distribute water and nutrients efficiently.
Transcribed Image Text:The red pathway (top) shows a ___ pathway of water transport. **Root sector in cross-section** - **Epidermal cell**: Outermost layer of cells in the root, where root hairs are located. - **Cortical parenchyma cell**: Cells found in the cortex region, responsible for storing nutrients and aiding in the transport of substances. - **Casparian strip**: A band of cell wall material in the endodermis, blocking passive water flow into the vascular cylinder. - **Endodermis**: Innermost layer of the cortex, regulating water flow to the xylem. - **Xylem vessel**: Conductive tissue responsible for transporting water and nutrients from roots to other parts of the plant. - **Pericycle**: Layer of cells just inside the endodermis, surrounding the vascular cylinder. **Root hair**: Hair-like structures that increase surface area for water absorption. Arrows highlight two pathways: - **Red line**: Indicates one pathway for water transport. - **Blue line**: Indicates an alternative pathway. Below the diagram: - **Epidermis**: Outer layer of the root. - **Cortex**: Middle layer, composed of parenchyma cells. - **Stele (Vascular cylinder)**: Central part of the root containing xylem and phloem. Understanding these structures and their roles in water transport is crucial for comprehending how plants absorb and distribute water and nutrients efficiently.
Expert Solution
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The transportation of water occurs with the help of xylem in plants. The water is absorbed by the root hair cells and this absorbed water must be transported to the vascular bundle for rapid, upward transportation through the vessel element of the xylem.

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