Root Hair Cells: Structure and Function
What Are Root Hair Cells?
Root hair cells are specialized cells located on the surface of plant roots. They have long,
thin extensions called root hairs that greatly increase the root’s surface area, allowing the
plant to absorb more water and mineral nutrients from the soil. These cells are vital for the
plant's survival, as they facilitate the uptake of essential resources.
Parts of a Root Hair Cell
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Cell Wall – Provides structure and protection for the cell.
Cell Membrane – Controls the movement of substances in and out of the cell.
Cytoplasm – Gel‑like substance where cellular activities occur.
Nucleus – Contains genetic material and controls cell functions.
Vacuole – Stores nutrients and helps maintain cell rigidity (turgor).
Mitochondria – Produce energy needed for active transport of minerals.
Root Hair – Long extension that increases surface area for absorption.
Function of Root Hair Cells
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Water absorption: Root hair cells absorb water from the soil by osmosis.
Mineral uptake: They actively transport mineral ions such as nitrates and potassium
into the root.
Anchorage: Root hairs help secure the plant firmly in the soil.
Increased surface area: The long extensions maximise the area for efficient absorption.