A xylem, core of a plant, distributes water and nutrients through the plant.
Tracheids Vessels Xylem parenchyma Xylem fibres
Xylem vessels
vessels
No they do not contain a nucleus.
trachieds and vessels
Tracheids Vessels Xylem parenchyma Xylem fibres
Xylem vessels
xylem and phloem
Mosses
vessel elements, tracheids, fibres, and parenchyma
the elements are :- tracheids, vessels xylem fibres and xylem parenchyma.
Pits are essentially holes in the xylem walls. Xylem walls are lignified by lignin, a material impermeable to war. The pits allow water to flow between xylem vessels of the plant - this is known as cross flow.
To conduct water
vessels
In Angiosperms , it is xylem vessels ( proto and meta xylem together ) , Xylem sclerenchyma and xylem parenchyma ; together form Xylem tissue ( That is why xylem is called a compound tissue ). In Gymnosperms , xylem vessels are replaced by Xylem tracheids . All other tings are almost the same .
Xylem vessels are water conducting tubes of the plant
primary xylem is primary in nature & is derived from procambium. But secondary xylem is secondary in nature and derived from fascicular cambium and interfascicular cambium. Primary xylem is differentiated into protoxylem and metaxylem, but secondary xylem has no such differentiation. In primary xylem vessels and tracheids are long and narrow, and vessels don't have tyloses, but in secondary xylem, vessels are blocked by tyloses, and vessels and tracheids are wider and shorter. Xylem fibres are more abundant in secondary xylem , and found in small numbers in primary xylem. Also unlike in primary xylem, secondary xylem has differentiated into sapwood & heartwood.