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Authoritative PPT Summary
"Transportation Function" PPT download
Part 1: Transport function of stems
Water and inorganic salts are absorbed by plant roots
Does leaf growth require water and inorganic salts?
How does water absorbed by the roots reach the leaves?
think:
Through what part of the stem are water and inorganic salts transported?
Conjectures and Assumptions:
1. The entire structure of the stem is involved in transportation.
2. The outer bark of the stem participates in transportation.
3. The internal structure of the stem is involved in transportation.
summary:
1. Structure of woody plant stems
bark
cambium
xylem
marrow
2. Transport of water and inorganic salts: from bottom to top through the xylem of the stem.
3. Vessels: structures located in the xylem that transport water and inorganic salts.
PPT on the role of transportation, part 2: observation and thinking:
This is the scene of collecting rubber from a rubber tree. Can you find where the rubber flows from?
Analysis and discussion:
A ring of bark is peeled off from the middle of the branches of woody plants, and the following changes occur after a period of time.
1. Describe the morphological changes above and below the incision.
2. Try to explain the reason for the formation of tumors above the incision.
3. Based on the above experimental results, infer the location of stems transporting organic matter.
summary:
1. Transportation of organic matter
Causes of branch tumors
Organic matter is transported from top to bottom in the phloem
2. Sieve tube: A structure located in the phloem of the bark that transports organic matter.
3. Comparison of ducts and sieve tubes.
Keywords: Beijing Normal University edition seventh grade biology PPT courseware free download, transport function PPT download, .PPT format;
For more information about the PPT courseware "The Lifestyle Transport Function of Green Flowering Plants", please click the "The Lifestyle Transport Function of Green Flowering Plants ppt" tab.
"Transportation Function" PPT courseware:
"Transportation" PPT courseware Scenario introduction Part of the organic matter produced by plants through photosynthesis is used to maintain life activities and part is stored. The nutrients needed by the roots are transported downward from the leaves. Which part of the stem structure is used to transport organic matter? Learning Objectives 1..
"Transportation Function" PPT:
"Transportation" PPT Part One Content: Situation Introduction The roots and stems of plants are connected and the leaves are attached to the stems and their branches. Therefore, the water and inorganic salts absorbed by the roots must be transported to the leaves and flowers through the stems. The water is transported to the leaves and flowers through the stems. How are inorganic salts transported to leaves and...