1)Vessel members are interconnected through perforation in their common walls 2)xylem fibres have obliterated Central lumens which may be septate or aseptate.... explain these two lines with respect to page 87 NCERT anatomy of flowering plants

only vessel elements have openings at both ends that connect individual vessel elementsto form a continuous tubular vessel. These end openings are called perforations or perforation plates.

Dear Student,

1. Vessel members are interconnected through perforation in their common walls.
Vessels are long, cylindrical tube-like structures made up of lignin. These consists of various cells called vessel elements or members. These vessel elements have openings at the both ends so that the individual vessel elements become connected. These end openings are known as perforations or perforation plates. These plates allows the vessel elements to form continuous tubular structure.

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1) Xylem vessels have common wall which is perforated or contains pores. So tranfer of water and ions are possible through it
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