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What is the difference between tracheids and vessels in xylem ?

Answer»
S.NoPropertyTracheidsVessels
1.Plants containing themIn all vascular elements(Pteri – dophytes, gymno – sperm and angio – sperms)Found mainly in angiosperms. Also in some pterido- phytes (e.g sela- ginella, Equisetum and pteridium) and gymnosperms (eg Gnetales)
2.LengthComparatively short and rarely exceed 1 mm in lengthUsually long and may attain 10 cm in length. Rarely reach to 2-6 metres (Quercus, Eucalyptus)
3.ShapeElongated with tapering ends end wall remains intact.Cells placed one upon the other and their end walls are either absent or possess perforation
4.Cell cavitiesNot much wideWide as compared to tracheids.



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