Xylem & Phloem Flashcards
(33 cards)
What are specialised cells in plants adapted for?
Perform different functions
For example, palisade mesophyll cells are specialised for photosynthesis.
What do palisade mesophyll cells contain that aids in photosynthesis?
A lot of chloroplasts
What do specialised cells join together to form?
Tissues
What type of tissue contains special cells that can turn into any type of plant cell?
Meristem tissue
Where is meristem tissue found in plants?
Growing tips of roots and shoots
What do different tissues join together to form?
Organs
What organ do palisade mesophyll tissue and other tissues form?
A leaf
What are the main organs of plants?
Roots, stems, and leaves
What do different organs in a plant work together to form?
An organ system
What is the function of the organ system involving roots, stems, and leaves?
Transport substances around the plant
What is the outer layer of tissue in a leaf called?
Epidermal tissue
What protective feature does epidermal tissue have?
A waxy cuticle
What is the purpose of the waxy cuticle in epidermal tissue?
Protect against water loss
What are the types of mesophyll tissue found in leaves?
Palisade mesophyll and spongy mesophyll
How are palisade mesophyll cells described?
Tall, thin, and tightly packed
What do spongy mesophyll cells contain that aids in gas exchange?
Spaces around them
What types of tissue does a leaf contain to support it?
Xylem and phloem tissue
What is the role of xylem cells?
Transport water up the plant
What is the role of phloem cells?
Transport sugars up and down the plant
What are the pores in a leaf called?
Stomata
What surrounds each stoma?
Guard cells
What happens to guard cells when they are filled with water?
They swell and open the stomata
What is transpiration?
Loss of water from the plant by evaporation and diffusion
What causes more water to be drawn in through the roots?
Water leaving through the stomata by diffusion
