"How Plants Absorb and Transport Water" Plant Life System PPT Courseware 2

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"How Plants Absorb and Transport Water" Plant Life System PPT Courseware 2

The only part of the root that absorbs water is the mature area of ​​the root tip.

There are a lot of root hairs in this part,

Their large number and thin cell walls increase the area for roots to absorb water.

Catheter (extracurricular knowledge)

Vessels, the tubular structures in the xylem of plants that mainly transport water and inorganic salts, are composed of a string of highly specialized tubular dead cells. The end walls of the cells are connected to each other by perforations. Each cell is called a vessel molecule or vessel node. . Vessel molecules are living cells in the early stages of development. After maturity, the protoplasts disintegrate and the cells die. During the maturation process, the cell wall becomes lignified and exhibits secondary thickening in different forms such as rings, whorls, ladders, reticulates, and pores. The end wall between two adjacent conduit molecules dissolves to form a perforated plate. Among angiosperms, except for a few families and genera (such as Quinlan and Amaranthus), there are vessels; vessels are also found in some ferns (such as Selaginella and Bracken) and in the order of Gymnosperms.

inferred:

The vessels in the stem that can transport water and inorganic salts

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"How Plants Absorb and Transport Water" Plant Life System PPT Courseware:

"How Plants Absorb and Transport Water" Plant Life System PPT Courseware 1. Characteristics of roots suitable for absorbing water 1. Structural characteristics of roots: a large number of root hairs (1) Observe the characteristics of the roots of cultured soybean seeds after germination ? (2) Think about the effect of large number of root hairs on water absorption...

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Update Time: 2024-11-22

This template belongs to science courseware People's Education Press Sixth Grade Science Volume 1 industry PPT template

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