Balsa wood structure, SEM

Balsa wood structure, SEM

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Caption: Balsa wood structure, coloured scanning electron micrograph (SEM). This wood is from the balsa tree (Ochroma pyramidale). This is a transverse section through the wood, showing two large tracheids (centre), part of the xylem tissue which transports water and minerals round the tree. Surrounding these is the coarse open grain, made up of air-filled chambers known as fibres and formed from sclerenchyma cells. It is these air-filled chambers that give balsa wood its low density compared to other woods. Magnification: x170 when printed 10 centimetres wide.

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Keywords: air filled, air-filled, balsa wood, biological, biology, botanical, botany, buoyant, cell, cells, chamber, chambers, coloured, false-coloured, fibre, fibres, flora, hole, holes, honey combed, honey-comb, honey-combed, honeycomb, light, light weight, light-weight, lightweight, lignin, low density, materials science, nature, ochroma pyramidale, scanning electron micrograph, sclerenchyma, section, sectioned, sem, structural, structure, tracheid, tracheids, transverse, tube, tubes, wood, xylem

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