Internal & External Structure Of Plants
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Systems of a plant
• Root system • Shoot system
Function of Roots
• The roots are to act an anchor to hold plants to the soils • Root fixation • Absorption of food and minerals • Translocation • Food storage
Classification Of Plants
• Taproot system • Fibrous root system • Adventitous roots
External Structure Of a Stem
• Node • Internode • Petiole • Axillary bud
Node
Points of attachment for leaves, aerial roots, and flowers
Internode
A section of stem between two stem nodes
Petiole
Stalk that extends from the stem to the base of the leaf
Axillary bud
Embryonic shoot that lies at the junction of the stem and petiole that gives rise to a branch or flower
Functions Of The Stem
• Stems transport water from different parts of the plant • Stems of some plants are photosynthetic • Stems may store nutrients
Internal Structure Of The Stem
• Phloem • Xylem • Cortex • Epidermis • Pith • Cambium