Leaves/Stems/Roots Flashcards
Node:
Where new leaves sprout
Internode:
Space between nodes
Lateral buds:
The beginning of new leaves
Vascular Tissue:
The stuff that makes up STEMS (either xylem or phloem)
Xylem tissue:
long tubular cells which transport water up
Phloem tissue:
Made of stacked cells connected by sieve plates which transport food made in leaves to rest of plant
Sieve Plates:
Allow nutrients to pass through cells
Leaf:
Primary site of photosynthesis
Petiole:
the thingy that connect leafs to stems
Cuticle (leaf):
waxy substance that covers leafs and maintains their moisture balance
Epidermis (leaf):
secretes waxy cuticle which protects leaf
Mesophyll (leaf):
inner part of leaf
Palisade layer (leaf):
upper section of mesophyll responsible for most of the chlorophyll that occurs on a plant
Vascular Bundles (Leaf):
Makes up veins: Section of the leaf that transports sugars produced in leafs.
Spongy layer (leaf):
Lower layer of mesophyll. Contains large air spaces when allow for passage of gases:
Guard cells:
open and close stomata
Stomata:
Allow moisture and gases to pass in and out of leaf
Roots:
Provide water and needed nutrients to the plant
Lateral roots:
Extend horizontally
Primary Roots:
extend downward
Root Cap:
Composed of dead, thick-walled cells that protect the tip of the roots as it burrows deeper
Meristematic Region: (roots)
Just above root cap. Has undifferentiated cells that carry out mitosis and grow to form the ELONGATION REGION
Elongation Region: (roots)
Just above the MERistematic region. Has cells that differentiate which grow and form large vacuoles
Maturation Region
Just above Elongation Region. Where cells differentiate more to form various root tissues
