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Science Chemical Change M3 S3 L3
Alberta LTB Module Booklet Vocabulary Module 3 Section 3 Lesson 3
5
Chemistry
10th Grade
02/24/2020

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Cards

Term

THE LEAF TISSUES & GAS EXCHANGE

 

 

LENTICEL

Definition

* An area of pores on the bark of some trees that allows gas exchange between the air&  the inner part of the trunk

 

*One of many raised pores in the stem of a woody plant that allows gas exchange between the atmosphere and the internal tissues 

Term

THE LEAF TISSUES & GAS EXCHANGE

 

MESOPHYLL

Definition

* A general term for the two types of tissue found between the upper epidermis & the lower epidermis

 

*The inner tissue of a leaf, containing many chloroplasts

 

*The most important role of the mesophyll cells is in photosynthesis. Mesophyll cells are large spaces within the leaf that allow carbon dioxide to move freely

Term

THE LEAF TISSUES & GAS EXCHANGE

 

PALISADE TISSUE CELL

Definition

*A cell where photosynthesis occurs & found just below the upper epidermis of leaves

 

* Are plant cells located on the leaves, right below the epidermis and cuticle. They are vertically elongated, a different shape from the spongy mesophyll cells beneath them. The chloroplasts in these cells absorb a major portion of the light energy used by the leaf

Term

THE LEAF TISSUES & GAS EXCHANGE

 

 

SPONGY MESOPHYLL TISSUE

Definition

* A layer of loosely packed cells that allows for movement of gases within the leaf; found between the palisade cells & the lower epidermis

 

*Spongy mesophyll In a leaf, mesophyll tissue comprising cells of irregular shape, some of them lobed, separated by large spaces in which the atmosphere is humid. Spongy mesophyll is the site of gaseous exchange for photosynthesis and respiration

Term

THE LEAF TISSUES & GAS EXCHANGE

 

 

TRANSPIRATION

Definition

* The process of water leaving a leaf through the stomata

 

Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism

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