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Plant Transport Systems
Jun 8, 2024
Plant Transport Systems
Overview
Plants have transport systems to move food, water, and minerals.
Unlike animals, plants don't have a heart or blood circulatory system.
Main transport systems:
Xylem
and
Phloem
.
Xylem
Function: Moves water and solutes from roots to leaves.
Structure: Made of elongated dead cells, impermeable to water with walls containing lignin.
Characteristics: Tough vessels, form a continuous tube throughout the plant.
Location: In the center of roots (prevent uprooting and provide protection), near the edge in stems (provide strength and support).
Direction: One-way movement (roots to leaves).
Phloem
Function: Moves glucose (produced in leaves by photosynthesis) and amino acids throughout the plant.
Structure: Made of living cells, form a continuous tube.
Characteristics: Transports sucrose and amino acids.
Location: Part of vascular bundles.
Direction: Two-way movement (up and down the plant).
Vascular Bundles
Composition: Groups of xylem and phloem vessels.
Arrangement: Varies in different parts of the plant; central in roots, peripheral in stems.
Upcoming Topics
Detailed look at xylem and transpiration (next video).
Key Terms:
Xylem
: Transports water and minerals.
Phloem
: Transports glucose and amino acids.
Vascular Bundles
: Groups of xylem and phloem cells.
Transpiration
: The process of water movement through a plant and its evaporation from aerial parts.
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