A well labelled flowering plant

Biology

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A flowering plant consists of two main systems: the root system and the shoot system.

Root System:

  • Primary Root: The main root that grows vertically downwards.
  • Lateral Roots: Branches that emerge from the primary root.
  • Root Cap: A protective layer of cells covering the tip of the root.
  • Root Hairs: Fine, hair-like extensions that increase the surface area for water and nutrient absorption.

Shoot System:

  • Stem: The main axis of the plant, supporting leaves, flowers, and fruits.
    • Nodes: Points on the stem where leaves and branches arise.
    • Internodes: The segments of the stem between two nodes.
    • Axillary Bud: A bud located in the axil (angle) between a leaf and the stem, capable of forming a branch or flower.
    • Apical Bud (Terminal Bud): The bud at the tip of the stem, responsible for primary growth in length.
  • Leaves: The primary organs for photosynthesis.
    • Petiole: The stalk that attaches the leaf blade to the stem.
    • Lamina (Leaf Blade): The broad, flat part of the leaf.
    • Midrib: The central vein of the leaf.
    • Veins: Vascular bundles within the leaf that transport water and nutrients.
    • Stipules: Small, leaf-like appendages at the base of the petiole (not always present).
  • Flower: The reproductive structure of the plant.
    • Sepals: Leaf-like structures that enclose and protect the bud.
    • Petals: Often brightly colored, attracting pollinators.
    • Stamen (Male Reproductive Part):
      • Anther: Produces pollen.
      • Filament: Supports the anther.
    • Pistil/Carpel (Female Reproductive Part):
      • Stigma: Receptive tip for pollen.
      • Style: Connects the stigma to the ovary.
      • Ovary: Contains ovules, develops into the fruit after fertilization.
      • Ovules: Contain the female gametes, develop into seeds after fertilization.
  • Fruit: The mature ovary, enclosing the seeds.
  • Seed: The mature ovule, containing an embryo and food reserves, capable of developing into a new plant.
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