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Perforations

perforation

1. The act of boring or piercing through a part.

2. A hole made through a part or substance.

Origin: L. Perforare = to pierce through


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Re: water movement in xylem

... sieve-tubes and transports the sugar throughout the plant body . The tracheids, vessel elements, and sieve-cells are all lines with pits and have perforations and open discs for transport. Xylem does have lignified cell walls, but they're covered in the pits for diffusion. 2) You have it pretty ...

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by Ariamezzo
Sat Feb 26, 2011 11:46 am
 
Forum: Botany Discussion
Topic: water movement in xylem
Replies: 2
Views: 6988


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