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Venation. Leaf veins are vascular bundles coming to the leaf from stem. The arrangement of veins in a leaf is called the venation pattern. Frequently, there is one or more main vein (primary vein) and secondary veins that branch from it. Tertiary veins branch from secondary veins (F igure \(\PageIndex{11}\)).
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31 paź 2023 · The arrangement of veins in a leaf is called the venation pattern; monocots have parallel venation, while dicots have reticulate venation. The arrangement of leaves on a stem is known as phyllotaxy; leaves can be classified as either alternate, spiral, opposite, or whorled.
The arrangement of veins in a leaf is called the venation pattern. Monocots and dicots differ in their patterns of venation ( Figure 30.22 ). Monocots have parallel venation; the veins run in straight lines across the length of the leaf without converging at a point.
The veins of a leaf consist of the vascular tissue that provides support and transportation within the leaf. There are two main types of veins: the larger, central veins called midribs, and the smaller, branching veins known as lateral veins.
What is the difference between a leaf with palmate venation and a palmately compound leaf? Draw and label a picture of a leaf with these parts: rachis, petiole, petiolule, and leaflet.
18 kwi 2013 · Overall structure of the leaf venation. Veins are composed of xylem and phloem cells embedded in parenchyma, sometimes sclerenchyma, and surrounded by bundle sheath cells. The vein xylem transports water from the petiole throughout the lamina mesophyll, and the phloem transports sugars out of the leaf to the rest of the plant.
17 gru 2021 · The arrangement of veins in a leaf is called the venation pattern; monocots have parallel venation, while dicots have reticulate venation. The arrangement of leaves on a stem is known as phyllotaxy; leaves can be classified as either alternate, spiral, opposite, or whorled.
