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External Parts Of A Leaf And Their Functions Pdf

external parts of a leaf and their functions pdf

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The leaf is the primary photosynthetic organ of the plant. It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. Sometimes leaves are divided into two or more sections called leaflets. Leaves with a single undivided blade are called simple, those with two or more leaflets are called compound leaves.

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Leaves have many structures that prevent water loss, transport compounds, aid in gas exchange, and protect the plant as a whole. The outermost layer of the leaf is the epidermis. It consists of the upper and lower epidermis, which are present on either side of the leaf. Botanists call the upper side the adaxial surface or adaxis and the lower side the abaxial surface or abaxis. The epidermis aids in the regulation of gas exchange.

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external parts of a leaf and their functions pdf

Leaves come in various sizes, colors, and physical features. You can use physical features to distinguish among different species and varieties of plants. Leaf.

What is the structure of a leaf?

Leaf Anatomy Coloring

A leaf is a plant organ that is flat, thin and usually green in color. It is mostly found above the ground and remains attached to the stem. Collectively, green leaves are called foliage.

Leaf , in botany , any usually flattened green outgrowth from the stem of a vascular plant. As the primary sites of photosynthesis , leaves manufacture food for plants, which in turn ultimately nourish and sustain all land animals. Botanically, leaves are an integral part of the stem system.

External Parts of a Leaf. Margin: This is the outer edging of the leaf. They can be in many different forms, i. Petiole: This part attaches the leaf to the actual plant stalk. Stipules: These are found at the base of the plant in pairs attached in between the petiole and the stalk of the plant.

Parts of a Leaf With Their Structure and Functions


  1. DorothГ©e M.

    06.06.2021 at 03:19

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