"Conducting Function of Plant Stems" PPT

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"Conducting Function of Plant Stems" PPT

Part One: Learning Objectives

1. Name the main structures of branch buds including meristem, young leaves, bud rachis and bud primordia, as well as the relationship between branch buds and stems;

2. Explain the basic structure of the stem, which is composed of four parts: bark, cambium, xylem and pith, and the functions of each part.

3. Name the location and function of the duct and sieve tube.

Preview test

1. Buds are ___ or ___ that will unfold in the future. Buds that will develop into branches in the future are called ______; buds that will develop into flowers in the future are called ______.

2. Branch bud is the original body of the branch, which is composed of _________, _____, ______ and _______. The ______ in the branch bud develops into leaves, ______ develops into new buds, ______ gradually elongates, and the branch bud It develops into new branches.

3. Plant stems can be divided into __________ and __________. The stems of woody plants are generally composed of four parts: ______, ______, _______ and _______.

4. The cells of ______ have the ability to divide, and the new cells formed will form new _____ outwards and new _____ inwards, which can make the stems of woody plants thicker year by year.

5. In the xylem and phloem of plant stems, there are many ____ and _____ respectively, which are the main channels of ______ in the plant. ______ has the function of transporting water and inorganic salts. ______ It has the function of transporting organic nutrients.

PPT on the conduction function of plant stems, part 2: introduction of new lesson

Do you know what is the tallest tree in the world?

The tallest tree in the world is the Australian almond eucalyptus, which can reach a height of 156m. Equivalent to 50 stories high

What organs do such tall trees and grass under the trees and other plants use to transport various substances from roots to leaves or from leaves to roots?

stem definition:

Stems are the above-ground branches of most plants, connecting roots and leaves. Stems with leaves and buds are also called branches or branches and develop from buds.

PPT on the conduction function of plant stems, part three: classroom activities

Activity 1: Read page 77 of the textbook, think about and answer the following questions (2 minutes):

1. How many types of buds are there? What kind of buds do branches develop from?

2.What parts does a branch bud consist of? What will they develop into in the future?

Thinking: Why do fruit farmers prune fruit trees every year? Are the flower buds or branch buds left after pruning?

In agricultural production, flower buds are generally retained as much as possible and branch buds are appropriately pruned to ensure more fruits.

Activity 2: Read pages 78-79 of the textbook, think about and answer the following questions (3 minutes)

1. What is the function of the outer part of the bark? What is the inner part? What's the structure inside? What organization does it belong to?

2. The stems of woody plants are very hard. What structure is related to them?

3. What is the lighter colored structure in the center and what is its function? What organization does it belong to?

4. What is the structure between xylem and phloem called? What are the characteristics? What organization is it?

PPT on the conduction function of plant stems, part 4: classroom experiment

Research experiment: The conduction function of stems

Watch the video and read pages 79-80 and think about the following questions:

1. Looking at the cross section of the stem, which part of the stem is stained red? What structure is there?

2. Looking at the longitudinal section of the stem, what is dyed red?

3. What was the conclusion from this experiment?

The xylem has a strong supporting force and contains conductive vessels, which are conductive tissues.

Phloem has sieve tubes and is a conductive tissue

Relevant scientific experiments have proven that organic matter produced by leaves is transported from ____ to ____ to the whole body of the plant through the ____ of the phloem of the bark.

PPT on the conduction function of plant stems, part 5: training to meet standards

1. The following is a longitudinal section of a branch bud, in which the meristem and bud primordium at the top are ( )

A. ① and ②

B. ① and ③

C.② and ③

D. ② and ④

2. In the "Conducting Function of Stem" experiment, the structure dyed red is ( )

A.Phloem B.Xylem C.Phloem and xylem D.Vessel

3. When the stems of plants such as mulberry trees are broken, white juice will ooze out from the cross section of the stems. The structure of the juice flowing out is ( )

A. Sieve tube B. Duct C. Medulla D. Cambium

4. Answer the question: The following are two types of transport tissues related to transport in plant stems. The arrows indicate the direction of the transported substances. Please fill in the appropriate content in the box in the picture.

Keywords: Jiangsu Education Edition seventh grade biology PPT courseware free download, PPT download, .PPT format;

For more information about "The Life of Green Plants and the Transport Function of Plant Stems" PPT courseware, please click on the "The Life of Green Plants PPT and the Transport Functions of Plant Stems" PPT tag.

"Conduction Function of Plant Stems" PPT download:

"Conduction Function of Plant Stems" PPT Download Types of buds Branch buds - buds that will develop into branches in the future Flower buds - buds that will develop into flowers in the future Mixed buds - contain leaf buds and flower buds, the structure and structure of branches, leaves and flower buds that will develop in the future Developing young leaf bud primordium new bud bud axis..

"Conduction Function of Plant Stems" PPT courseware:

"Conduction Function of Plant Stems" PPT courseware Part One: Classroom Questions Stems are the branches of the above-ground part of most plants, connecting roots and leaves. Stems, also called branches or branches, develop from buds. Questions: 1. What are the main trunks and side branches of plants developed from?

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Update Time: 2024-06-26

This template belongs to biology courseware Jiangsu Education Edition Seventh Grade Biology Volume 1 industry PPT template

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