Root Structure and Hair Function — NEET Biology
✅ Asked in NEET 2026The root is covered at the apex by a thimble-like structure called the root cap. It protects the tender apex of the root as it makes its way through the soil. A few millimetres above the root cap is the region of meristematic activity. The cells of this region are very small, thin-walled and with dense protoplasm. They divide repeatedly. The cells proximal to this region undergo rapid elongation and enlargement and are responsible for the growth of the root in length. This region is called the region of elongation. The cells of the elongation zone gradually differentiate and mature. Hence, this zone, proximal to region of elongation, is called the region of maturation. From this region some of the epidermal cells form very fine and delicate, thread-like structures called root hairs. These root hairs absorb water and minerals from the soil.
NTA tests students on understanding the three root zones (meristematic, elongation, maturation) and the origin of root hairs from the maturation zone. Students often confuse where root hairs form—they mistakenly think hairs develop in the elongation zone, but they actually form only in the mature region after cells have differentiated. Root hairs are crucial for water and mineral absorption, making this a high-priority topic. Remember: meristematic cells divide, elongation cells grow longer, and maturation cells produce root hairs. This concept directly links root anatomy to function, which NTA frequently tests.
In angiosperms, root hairs arise from which one of the following regions of the root?
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
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