Chapter 6 — Anatomy of Flowering Plants

Chapter 6 of the Class 11 Biology NCERT textbook, "Anatomy of Flowering Plants", explains this topic. Anatomy of flowering plants studies the internal tissue organization of plants through their epidermal, ground, and vascular tissue systems, which differ markedly between dicotyledonous and monocotyledonous species.

• Three tissue systems — The chapter organizes plant interiors into three cooperating tissue systems—epidermal for protection and exchange, ground for support and storage, and vascular for conducting water and food—that together run every organ.
• Dicot versus monocot anatomy — It contrasts the two flowering-plant types internally: dicots have open vascular bundles with cambium allowing secondary growth, while monocots have closed bundles that cannot thicken over time.
• Structure tuned to function — The chapter links form to job—stomata and guard cells govern gas exchange and transpiration, and leaf layouts (dorsiventral palisade/spongy in dicots, isobilateral with bulliform cells in monocots) match each plant's water needs.

1. 01Three tissue systems organize plant anatomy: epidermal (protective outer layer), ground (supporting and storage bulk tissue), and vascular (water and mineral conducting system)
2. 02Stomata regulate transpiration and gas exchange; each comprises two guard cells enclosing a pore, with subsidiary cells forming the stomatal apparatus
3. 03Dicots have open vascular bundles with cambium between xylem and phloem enabling secondary growth; monocots have closed bundles without cambium preventing secondary growth
4. 04Dicot roots have 2-4 xylem bundles and small pith; monocot roots have more than six polyarch xylem bundles with large, well-developed pith
5. 05Dorsiventral dicot leaves contain distinct palisade parenchyma (adaxial) and spongy parenchyma (abaxial); isobilateral monocot leaves lack mesophyll differentiation with bulliform cells