What Do The Pits In The Xylem Mean? Is It Similar To The Perforations In The Common Walls?

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Solution

Pits:
These are the minute openings that are present inside the secondary cell wall of xylem tissues.
They act as the channels for the transport of water and minerals between the adjacent cells.
Depending on the concentration of lignin, they are of varying thickness.
Most of the pits are complementary in nature i.e. present opposite to each other in the neighboring cells.
Perforations: These on the other hand are penetrations in the plant tissue that have equal thicknesses.
No, pits can not be said similar to the perforations in the common walls.

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What do we call the element in xylem transport that is made of long, hollow, dead cells with wall pits?

	I		II
(a)	Tracheids	(i)	Cells possess highly thickened walls with oblilateral central lumen
(b)	Vessels	(ii)	Elongated tube like cells with thick lignified walls and tapering ends
(c)	Xylem parenchyma	(iii)	Individual members are interconnected through perforations in their common walls
(d)	Xylem fibres	(iv)	Cells are living with thin cellulose cell wall.

what are vascular tissue and what are the usage of pits in xylem tissues

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