![](https://nthumb.tpgimages.com/mid2_com_img/1339/17584/TOP16630762.jpg)
Scots pine (Pinus sylvestris) root. Light micrograph of a section through a root from a Scots pine tree, showing (from outside in): outer bark with early periderm; cork cells; cortex of parenchyma cells; primary phloem and secondary phloem. Next, the vascular cambium, secondary xylem and resin canals. Then the primary xylem consisting of protoxylem (small cells). At centre is the metaxylem (larger cells). The subsidiary medullary rays and the principal medullary rays, composed of parenchyma cells, are also seen.
px | px | dpi | = | cm | x | cm | = | MB |
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Creative#:
TOP16630762
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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N/A
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No
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1anatomicalanatomybackgroundbiologicalbiologybotanicalbotanycambiumcanalcanalscellcellsconiferconiferouscorkcortexcutcutcut-outcut-outscutoutcutoutsearlyfloragymnospermgymnospermshistologicalhistologylightlightmedullarymetaxylemmicrographmicroscopenatureno-onenobodyoneoutoutsparenchymaperidermphloemphloempinepinusplantplantsprimaryprincipalprotoxylemrayraysresinrootroundscotssecondarysectionsectionedsinglesubsidiarysylvestristissuetreevascularwhitewildlifexylemyoung