Anatomy of Flowering Plants is Chapter 6 of NCERT Class 11 Biology and part of Unit 2, Structural Organisation in Animals and Plants, of the NEET UG syllabus. These notes cover the epidermal, ground and vascular tissue systems, types of vascular bundles, and the internal structure of dicot and monocot roots, stems and leaves, with a free notes PDF.
Anatomy of Flowering Plants NEET Notes
Section-wise key points from NCERT Chapter 6, comparison tables, high-yield facts and common mistakes for NEET 2027 revision.
Anatomy of Flowering Plants at a Glance
| Item | Details |
|---|---|
| NEET UG syllabus unit | Unit 2: Structural Organisation in Animals and Plants |
| NCERT textbook | Biology, Class 11, Chapter 6 (rationalised book) |
| Other chapters in the unit | Morphology of Flowering Plants (Chapter 5), Structural Organisation in Animals (Chapter 7) |
| Syllabus topics | Tissues; anatomy and functions of different parts of flowering plants: root, stem and leaf |
| Official chapter | NCERT Chapter 6 |
| Notes PDF | View PDF |
The topic list follows the NEET UG 2026 syllabus released by the National Medical Commission (NMC) on 22 December 2025, which stays the reference until the 2027 syllabus is out. The full list is on the NEET syllabus page.
The rationalised NCERT chapter keeps two sections, the tissue system and the anatomy of dicot and monocot plants. Its summary still classifies plant tissues, so revise those points too (see the last notes section).
What are the three tissue systems of a plant?
Anatomy is the study of internal structure. By structure and location, plant tissues form three tissue systems: epidermal, ground (fundamental) and vascular (conducting).
| Tissue system | What it includes | Main role |
|---|---|---|
| Epidermal | Epidermal cells, stomata, epidermal appendages (trichomes and hairs) | Outermost covering of the whole plant body |
| Ground | All tissues except epidermis and vascular bundles: parenchyma, collenchyma, sclerenchyma | Cortex, pericycle, pith and medullary rays; mesophyll in leaves |
| Vascular | Complex tissues xylem and phloem, together forming vascular bundles | Conduction of water, minerals and food |
Epidermal Tissue System: Epidermis, Stomata and Hairs
The epidermis is the outermost layer of the primary plant body, usually single-layered, made of elongated, compactly arranged parenchymatous cells with a large vacuole.
- A waxy thick cuticle on the epidermis prevents water loss. The cuticle is absent in roots.
- Stomata in the leaf epidermis regulate transpiration and gaseous exchange.
- Each stoma has two bean-shaped guard cells enclosing the stomatal pore; in grasses the guard cells are dumb-bell shaped.
- Outer walls of guard cells (away from the pore) are thin; inner walls (towards the pore) are highly thickened. Guard cells have chloroplasts and regulate opening and closing.
- Subsidiary cells are specialised epidermal cells near the guard cells. Stomatal aperture + guard cells + subsidiary cells = stomatal apparatus.
- Root hairs are unicellular elongations of epidermal cells that absorb water and minerals.
- Trichomes are epidermal hairs on the stem, usually multicellular, branched or unbranched, soft or stiff, sometimes secretory; they help prevent water loss by transpiration.
Ground and Vascular Tissue Systems
Ground tissue is made of simple tissues; vascular tissue is made of the complex tissues xylem and phloem.
- Parenchyma cells are usually present in the cortex, pericycle, pith and medullary rays of primary stems and roots.
- In leaves, the ground tissue is thin-walled, chloroplast-containing mesophyll.
| Vascular bundle type | Arrangement | Where found |
|---|---|---|
| Open | Cambium present between xylem and phloem, so secondary xylem and phloem can form | Dicot stems |
| Closed | No cambium, so no secondary tissues | Monocots |
| Radial | Xylem and phloem alternate on different radii | Roots |
| Conjoint | Xylem and phloem on the same radius; phloem usually only on the outer side of xylem | Stems and leaves |
Dicot Root vs Monocot Root
NCERT describes the transverse section of the sunflower root as the typical dicot root.
- The outermost layer is the epiblema; many of its cells protrude as unicellular root hairs.
- The cortex has several layers of thin-walled parenchyma with intercellular spaces.
- The endodermis is a single layer of barrel-shaped cells without intercellular spaces; its tangential and radial walls carry casparian strips of suberin, a water-impermeable waxy material.
- The pericycle is a few layers of thick-walled parenchymatous cells next to the endodermis; lateral roots and the vascular cambium (during secondary growth) start here.
- Conjunctive tissue is the parenchyma between xylem and phloem.
- All tissues inside the endodermis (pericycle, vascular bundles and pith) form the stele.
| Feature | Dicot root | Monocot root |
|---|---|---|
| Xylem bundles | Usually two to four xylem and phloem patches | Usually more than six (polyarch) |
| Pith | Small or inconspicuous | Large and well developed |
| Cambium and secondary growth | A cambium ring develops later between xylem and phloem | No secondary growth |
| Common features | Epidermis, cortex, endodermis, pericycle, vascular bundles, pith | Same tissues present |
Dicot Stem vs Monocot Stem
The young dicot stem has a cuticle-covered epidermis that may bear trichomes and a few stomata, then a three-zoned cortex.
- Hypodermis: a few layers of collenchyma just below the epidermis that give mechanical strength to the young stem.
- Below it, rounded thin-walled parenchyma with conspicuous intercellular spaces.
- Endodermis: the innermost cortical layer, rich in starch grains, so it is also called the starch sheath.
- Pericycle lies inside the endodermis and above the phloem as semi-lunar patches of sclerenchyma.
- Medullary rays are a few layers of radially placed parenchyma between vascular bundles.
- Pith: rounded parenchyma with large intercellular spaces in the centre.
| Feature | Dicot stem | Monocot stem |
|---|---|---|
| Hypodermis | Collenchymatous | Sclerenchymatous |
| Vascular bundles | Arranged in a ring (characteristic of dicot stem) | Large number, scattered; peripheral ones smaller than central ones |
| Type of bundle | Conjoint, open, with endarch protoxylem | Conjoint and closed, each with a sclerenchymatous bundle sheath |
| Other features | Medullary rays and a central pith | Large parenchymatous ground tissue; phloem parenchyma absent; water-containing cavities in the vascular bundles |
Dorsiventral (dicot) Leaf vs Isobilateral (monocot) Leaf
A vertical section of the lamina shows three parts: epidermis, mesophyll and vascular system.
- Both the upper (adaxial) and lower (abaxial) epidermis have a conspicuous cuticle.
- Mesophyll is chloroplast-containing parenchyma that carries out photosynthesis.
- Palisade parenchyma (adaxial) has elongated cells arranged vertically and parallel; spongy parenchyma below it has oval or round, loosely arranged cells with large spaces and air cavities.
- Vascular bundles in the veins and midrib are surrounded by thick-walled bundle sheath cells; their size depends on the size of the veins.
- In grasses, some adaxial epidermal cells along the veins become large, empty, colourless bulliform cells. When turgid the leaf surface is exposed; when flaccid under water stress the leaf curls inwards to reduce water loss.
| Feature | Dorsiventral (dicot) leaf | Isobilateral (monocot) leaf |
|---|---|---|
| Stomata | More on the abaxial (lower) epidermis; adaxial may lack them | Present on both surfaces |
| Mesophyll | Differentiated into palisade and spongy parenchyma | Not differentiated |
| Venation and bundles | Reticulate; veins vary in thickness | Parallel; vascular bundles of near similar size (except main veins) |
Plant Tissues: Points from the NCERT Summary
The rationalised chapter’s summary still lists the tissue classes, and ‘Tissues’ is a NEET syllabus topic in Unit 2.
- Plant tissues are broadly classified into meristematic (apical, lateral and intercalary) and permanent (simple and complex).
- Main functions of tissues: assimilation and storage of food, transport of water, minerals and photosynthates, and mechanical support.
- Monocots and dicots differ in the type, number and location of vascular bundles.
- Secondary growth occurs in most dicot roots and stems.
Most-asked Facts for NEET: Anatomy of Flowering Plants
Revise these one-line facts from the NCERT chapter just before the exam.
- Three tissue systems: epidermal, ground (fundamental) and vascular (conducting).
- Cuticle is absent in roots.
- Guard cells are bean-shaped; dumb-bell shaped in grasses.
- Guard cell inner walls (towards the pore) are thick; outer walls are thin.
- Stomatal apparatus = stomatal aperture + guard cells + subsidiary cells.
- Root hairs are unicellular; stem trichomes are usually multicellular.
- Open bundle has cambium (dicot stem); closed bundle has none (monocots).
- Radial bundles occur in roots; conjoint bundles in stems and leaves.
- Casparian strips are suberin on the tangential and radial walls of the root endodermis.
- Lateral roots and the vascular cambium arise from the pericycle in roots.
- Stele = pericycle + vascular bundles + pith.
- Monocot root is polyarch (more than six xylem bundles) with a large pith.
- Dicot stem endodermis is the starch sheath; pericycle is semi-lunar sclerenchyma patches.
- Dicot stem bundles: conjoint, open, endarch protoxylem, in a ring.
- Monocot stem: scattered, conjoint, closed bundles with sclerenchymatous sheath; no phloem parenchyma; water-containing cavities.
- Isobilateral leaf: stomata on both surfaces, undifferentiated mesophyll.
- Bulliform cells (grasses) make the leaf curl inwards when flaccid.
Common Mistakes to Avoid
Watch for these mix-ups when you answer questions on this chapter.
- Saying casparian strips are made of lignin or cover all walls. NCERT says suberin, on the tangential and radial walls.
- Giving roots a cuticle. The cuticle is absent in roots.
- Reversing guard cell walls: the inner walls towards the pore are thick, the outer walls are thin.
- Calling monocot stem bundles open. They are closed, with no cambium and no phloem parenchyma.
- Mixing up the hypodermis: collenchyma in dicot stems, sclerenchyma in monocot stems.
- Treating the stem pericycle like the root pericycle. In the dicot stem it is semi-lunar patches of sclerenchyma; in the dicot root it is thick-walled parenchyma.
- Giving the dicot root a large pith. It is small or inconspicuous; the monocot root has a large pith.
- Saying monocot roots show secondary growth. They do not.
- Putting more stomata on the upper surface of a dicot leaf. The lower (abaxial) surface usually has more.
- Saying bulliform cells are on the lower epidermis. They are modified adaxial (upper) epidermal cells along the veins.
Anatomy of Flowering Plants Notes PDF and Related Pages
Download the AglaSem notes for Anatomy of Flowering Plants (key notes and important questions with answers) free: View PDF
- All chapters: NEET Biology notes
- Full topic list: NEET syllabus
- Practice: NEET question papers
- Source text: NCERT Chapter 6 (NCERT, Class 11 Biology)
NEET Biology Notes: All Chapters
Botany
- The Living World
- Biological Classification
- Plant Kingdom
- Cell: The Unit of Life
- Plant Growth and Development
- Anatomy of Flowering Plants
- Cell Cycle and Cell Division
- Respiration in Plants
- Photosynthesis in Higher Plants
- Morphology of Flowering Plants
- Principles of Inheritance and Variation
- Microbes in Human Welfare
- Sexual Reproduction in Flowering Plants
- Molecular Basis of Inheritance
- Organisms and Populations
- Ecosystem
- Biodiversity and Conservation
Zoology
- Animal Kingdom
- Biomolecules
- Breathing and Exchange of Gases
- Excretory Products and their Elimination
- Body Fluids and Circulation
- Structural Organisation in Animals
- Locomotion and Movement
- Reproductive Health
- Chemical Coordination and Integration
- Neural Control and Coordination
- Evolution
- Human Health and Disease
- Human Reproduction
- Biotechnology and its Applications
- Biotechnology: Principles and Processes
All chapters with their notes PDFs are on the NEET Biology notes page.
Anatomy of Flowering Plants NEET Notes FAQs
Which NCERT chapter is Anatomy of Flowering Plants?
It is Chapter 6 of the NCERT Class 11 Biology textbook, in Unit 2, Structural Organisation in Plants and Animals, between Morphology of Flowering Plants (Chapter 5) and Structural Organisation in Animals (Chapter 7).
Is Anatomy of Flowering Plants in the NEET 2027 syllabus?
It is in the latest NEET UG syllabus (2026, released by NMC on 22 December 2025) under Unit 2, which lists tissues and the anatomy and functions of root, stem and leaf. Check the syllabus page once the 2027 syllabus is out.
How can you tell a monocot stem from a dicot stem in a section?
A monocot stem has many scattered, conjoint, closed vascular bundles with sclerenchymatous bundle sheaths, no phloem parenchyma and a sclerenchymatous hypodermis. A dicot stem has bundles arranged in a ring that are conjoint and open, and a collenchymatous hypodermis.
What is the difference between open and closed vascular bundles?
Open vascular bundles, as in dicot stems, have cambium between xylem and phloem and can form secondary tissues. Closed bundles, as in monocots, have no cambium and do not form secondary tissues.
Are these notes enough for NEET questions on plant anatomy?
No. Read NCERT Chapter 6 line by line first, because NEET Biology questions closely follow the NCERT textbooks. Use these notes and the PDF for quick revision, then practise previous year questions.