transport systems-plants Flashcards
(15 cards)
What are the main organs of a plant?
leaves, roots, and the stem.
What is the function of the waxy cuticle?
Prevents water loss
What is the function of the upper epidermis?
Allows light to pass through and prevents water loss
What is the function of the palisade mesophyll?
Main cells involved in photosynthesis.
What is the function of the spongy mesophyll?
Contain air spaces to allow gas exchange
What is the function of the guard cells
Control the opening and closing of stomata
what are the stomata
Air spaces that allow oxygen and water to leave and carbon dioxide to enter the leaf.
How does a plant obtain water?
A plant obtains water through the roots.
How is water transported around the plant?
Roots contain specialised cells called root hair cells.
Water is transported from the roots to other parts of the plant through dead Xylem vessels.
What is the name of the structures within xylem vessels?
Rings of lignin.
What will affect the rate of transpiration?
The environmental conditions are:
Wind speed Humidity Temperature Surface area
1.
What is transpiration dependent upon?
the evaporation of water from the stomata.
Name the tissue that transport sugars around a plant
living phloem vessels
What is associated with phloem cells to allow sugar to be transported around the plant?
sieve plates and associated companion cells
describe the process of transpiration
water diffuses into the root hair cells by osmosis absorbed water, then travels through the xylem to get to the leaves. water evaporates through the stomata
