3.2+3.3 - The Leaf Tissues & Gas Exchange

The ______ is a collection of tissues whose main purpose is to carry out or support the process of ______

Dermal, ground, and vascular tissue all have a ______ purpose and function

The ______ has specialized cells to maximize its ability to exchange ______

Leaf dermal tissue • the ______ is on both the top and underside of the leaf and is clear and very thin • specialized cells called ______ cells form tiny openings or pores, mostly on the underside of the leaf called ______ • ______ allows gas exchange to happen easily • they open to air hammers that connect with cells of the ______ tissue • CO2 and oxygen can enter and exit the cell by ______ (dependent on the gradient)

______ cells • control whether the ______ is open or closed • stimulated by ______ (active transport—needs energy) • protect the leaves from losing too much ______ • the process of water leaving the leaf through the ______ is called ______

Leaf ground tissue - between the upper and lower ______ of the leaf we specialized ground tissues called ______

Mesophyll tissues - there are two kinds: ______ and ______

______ mesophyll tissue cells • below the epidermis • responsible for ______

______ mesophyll tissue cells • loosely packed, irregularly shaped cells • allows for ______ by diffusion throughout the leaf

Leaf vascular tissue • leaf ______ • provides the leaf with water needed for ______ and ______ (xylem) • removed ______ (phloem) formed from ______ • the xylem and phloem are bunched together in ______ bundles

Gas exchange in plants • the leaf is not the only place where ______ occurs • ______ are pores which occur along woody stems and mature roots • look like slashes or blisters