Elm stem,light micrograph

Numéro d’image : 11565158
Elm stem,light micrograph
Elm stem. Light micrograph of a transverse section through the one-year-old woody stem of an elm (Ulmus procera) tree. The outer layer (epidermis,dark ring) is being sloughed (pushed/broken) off by developing underlying cork (red-brown),underneath which is the cortex made of collenchyma (orange-red). The lower cortex has bands of phloem fibres (red) and a layer of phloem sieve tubes (solid red with cavities). Under the phloem is a ring of cambium (light-red circle) and under this is a thick layer of wood (xylem,purple-red) with six vascular bundles. The solid pith (pink,centre) is composed of parenchyma cells. Magnification: x46 when printed 10 centimetres wide
Licence : Droits gérés
Crédit: Science Photo Library / Wheeler, Dr. Keith
Taille de l’image : 5362 px × 5241 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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