"Place of Plant Photosynthesis" PPT

Description

"Place of Plant Photosynthesis" PPT

Part 1: Main parts of the blade

The leaves of green plants are generally green and flat, and they are spread out in space to absorb sunlight.

Leaves are the main organ of photosynthesis in green plants

The blade is the main part of the leaf

Leaves are the main organs of photosynthesis in green plants, and leaves are the main part of leaves. As the main organ of photosynthesis, leaves have what structures and functions that are compatible with their structures?

The structure of the blade

Purpose:

Identify the structure of leaves

Practice slicing with your bare hands

PPT where plant photosynthesis occurs, part 2: basic structure of leaves

Macroscopic observation:

Observe the structure of the blade from the outside to the inside, and draw conclusions after group discussions.

Discuss and think

What three parts does a blade consist of? Can you describe the characteristics of each part?

Microscopic observation:

1 Make temporary slices

How to make temporary slices:

Select material

Cut material

leaf flakes

Selection of materials for production

Regardless of the shape of the blade, its basic structure is the same

Structural pattern diagram of blade

Epidermis - protective tissue

Leaf mesophyll - vegetative tissue

Leaf veins - conductive tissue

The site of plant photosynthesis PPT, the third part: the structure and function of the epidermis

The epidermis covers the entire periphery of the leaf and is divided into upper epidermis and lower epidermis. It is generally composed of a layer of closely arranged, colorless and transparent flat cells.

Most of the outer walls of epidermal cells are keratinized, forming a transparent and impermeable stratum corneum.

There are many crescent-shaped guard cells scattered among the epidermal cells, and the gaps between the guard cells are called stomata. Stomata provide the gateway for gas exchange between the leaf and the outside environment

think:

What is the significance of the cuticle of the leaf epidermis to the life of the plant?

answer:

1. Reduce water transpiration

2. Protect plants from bacteria and fungi

3. Prevent damage to leaves from excessive sunlight

Plant photosynthesis site PPT, part 4 content: composition of leaves

Mesophyll is located between the upper epidermis and lower epidermis and is composed of many parenchyma cells.

palisade tissue spongy tissue

Chloroplasts are where nutrients are made

Chlorophyll is a pigment in chloroplasts. In addition to chloroplasts, it also contains carotene and lutein. But it is mainly chlorophyll, so the leaves appear green.

vein:

Definition: Fascicular structures in the mesophyll

Function: Transport water, inorganic salts and organic matter to support the leaf surface

Chloroplasts are the site of photosynthesis

Mesophyll cells and guard cells of leaves contain chloroplasts

Chloroplasts contain chlorophyll

Chlorophyll absorbs light energy

Keywords: Jiangsu Education Edition seventh-grade biology PPT courseware free download, PPT download of plant photosynthesis sites, .PPT format;

For more information about the PPT courseware "Photosynthesis and Respiration of Green Plants and Places of Plant Photosynthesis", please click the "Photosynthesis and Respiration of Green Plants ppt Places of Plant Photosynthesis" ppt tag.

"Place of Plant Photosynthesis" PPT courseware:

Contents of the first part of the PPT courseware "The Place of Plant Photosynthesis": Objectives of this section: 1. Tell the structure and main functions of green plant leaves. 2. Tell that chloroplasts are the place of plant photosynthesis. The leaves of green plants are generally green and flat. Yes, put it in the empty space...

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Update Time: 2024-09-06

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

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