Phloem

Subdecks (4)

What does phloem tissue do?
Transports organic substances like sugars in solution both up and down the plant
What is phloem tissue adapted for?
Transporting solutes
what are solutes?
Dissolved substances
what does phloem tissue do?
Transports solutes (mainly sugars like sucrose) round plants
what is phloem formed from?
Like xylem, phloem is formed from cells arranged in tubes
what are important cell types in phloem tissue?
Sieve tube elements
Companion cells
What are sieve tube elements?
Living cells that form the tube for transporting solutes
They have no nucleus or living organelles (Companion cells help)
explain companion cells? 
There is a companion cell for each sieve tube element
They carry out living functions for sieve cells, e.g. providing the energy needed for the active transport of solutes
what is phloem?
tissue that transports organic substances in plants
what is xylem?
tissue that transports water in the stem and leaves of plants