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Internal and External structure of a leaf
Leaves
33
Biology
10th Grade
11/29/2012

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Term
Dermal issue
Definition
Protects leaf and enables outside reactions
Term
Epidermis
Definition
The last outside layer of cells in a plant.
Term
Cuticle
Definition
A protective waxy cover made by the epidermal cells and is made of cutin.
Term
Cork
Definition
Dead epidermal cells found only in bark
Term
Vascular Tissue
Definition
Carries water, minerals, glucose.
Term
Xylum
Definition
Carries minerals and water and is thick walled and present in the center.
Term
Phloem
Definition
Carries Glucose down the plant and is on the outside of the fibro vascular.
Term
Ground Tissue
Definition
Tissue that stores food.
Term
Parenchyma
Definition
Its abundant in leaves and consists of vacuoles and
Term
Collenchyma
Definition
Derived from "colle" they are strong and flexible abundant in stems and cell wall is thicker than Parenchyma and its in leaf veins.
Term
Sclerenchyma
Definition
Thickest cell wall and abundant in stems.
Term
Meristematic Tissue
Definition
Its present in buds and root tips and promotes growth.
Term
Bud
Definition
The little nub thats on the end of things.
Term
Root Tip
Definition
Meristematic is present in the tips of root.
Term
Stem
Definition
Meristematic tissue
Term
Vascular Cambium
Definition
Meristemtic tissue that allows the vascular system grow.
Term
Cork Cambium
Definition
Makes the stem thicker.
Term
Blade
Definition
The leaf
Term
Margins
Definition
The outside edge of the leaf
Term
veins
Definition
Xylum and Plhoem
Term
Petiole
Definition
The part that connects the leaf and the stem
Term
Stipule
Definition
The little bud that comes out when a leaf and a stem connect.
Term
Simple
Definition
A leaf thats not compound
Term
Compound
Definition
More that one leaf blade per petiole and one pair of stipules per a petiole.
Term
Parrellel
Definition
Veins go out parallel to each other
Term
Pinnate
Definition
One large vein in the middle veins come off the side.
Term
Palmate
Definition
Featherlike
Term
Node
Definition
an area on the stem where a leaf grows from the stem
Term
Stomata
Definition
They are pores in the leaf that lets leaves travel in and out.
Term
Guard cell
Definition
Opens and closes stomata to keep water in and out.
Term
Mesophyll
Definition
Parenchyma cells that lie inbetween the epidermis layer.s
Term
Pallisade Mesophyll
Definition
position above the upper epidermis contains the largest number of chloroplast cells
Term
Spongy Mesophyll
Definition
Allows interchange of gasses for photosynthesis.
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