GCSE Biology (AQA)

331 videos | 14 hours

Phloem

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Organisation Plant Tissues, Organs and Systems

Phloem

1:57 Xylem, Phloem and Meristem Tissue
Spec 4.2.3.1 4.2.3.2 4.1.1.3
Previous Xylem Next Comparing Xylem & Phloem
  • Phloem tissue is part of the plant organ system responsible for transport.
  • It is depicted in blue in a cross-section of a stem.
  • Phloem moves dissolved sugars in the form of sap throughout the plant.
  • Sugars are produced in the leaves during photosynthesis.
  • These sugars are then transported to be used immediately or stored for later use.
  • Sugars can be used for growth or stored in parts like tubers, such as potatoes.
  • Phloem tissue can move dissolved sugars both upwards and downwards in the plant.
  • The movement of sugars is facilitated by cells on the outside that provide energy.
  • Phloem tissue consists of tubes made from elongated living cells.
  • The end walls of these cells have pores that allow cell sap to move through.
  • These features are specifically adapted for the transport of dissolved sugars.
  • The structure of phloem, including elongated cells with pores in their end walls, enables the movement of sap and dissolved sugars throughout the plant.

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.