"Observe the living world around you with a microscope (2)" Tiny World PPT download

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"Observe the living world around you with a microscope (2)" Tiny World PPT download

Part One Content: New Lesson Learning

A stomata is an opening between two guard cells on the plant epidermis. It is a channel for plant gas and water vapor to transpire, and is a gateway between the plant body and the environment. Physiological changes in guard cells can regulate the opening and closing of stomata and control the entry and exit of gas and water vapor.

The stomata and guard cells of broad beans and other dicotyledonous plants are half-moon shaped.

Corn is a monocotyledonous plant, and the guard cells that make up the stomata are dumbbell-shaped.

Chloroplasts are green oblate plastids contained in green plant cells. It is the basic place for plants to carry out photosynthesis. Mainly distributed in mesophyll cells in green leaves and surface cells of young stems.

According to experimental speculation, the number of chloroplasts in each square millimeter of castor leaves is as high as hundreds of thousands.

Red blood cells, also called erythrocytes, are spherical in shape, with thick edges and a slightly concave center, with a diameter of 6 microns to 9 microns. Red blood cells are thin and elastic, and their main component is hemoglobin, which is responsible for transporting itch and carbon dioxide.

Use a microscope to observe the living world around you PPT, part 2: expansion and extension

All living things except viruses are made of cells. There are both single-celled organisms and multi-celled organisms in nature. Cells are the basic structural and functional units of organisms. Cells are an indispensable part of the biological world.

Cell biology makes extensive use of the achievements of adjacent disciplines, learns from each other's strengths in technical methods, and uses any method that can solve problems.

Summary of this lesson

Cells are the most basic structural unit of organisms and the most basic functional units of organisms. Life activities such as respiration, digestion, excretion, growth, development, reproduction and inheritance of organisms are all carried out through cells.

Use a microscope to observe the living world around you PPT, part three: exercises for this lesson

1. Fill in the blanks

1. All living things except viruses are composed of ( ).

2. The stomata in the leaf epidermis and the ( ) in the mesophyll cells are very important parts of the plant for respiration and photosynthesis.

3. ( ) demonstrates the structural unity and common origin of evolution of the entire biological world.

2. Judgment questions

1. Corn is a monocotyledonous plant, and the guard cells that make up the stomata are two dumbbell-shaped. ( )

2. Red blood cells, also called red blood cells, are spherical in shape, with thicker edges, slightly concave in the middle, and a diameter of 6 nanometers to 9 nanometers. ( )

3. Cells have a variety of functions. ( )

Use a microscope to observe the living world around you PPT, Part 4: Homework

Continue to observe the cells of various organisms, compare the cell shapes of different organisms and draw them.

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"Tiny World and Us" Tiny World PPT:

"Tiny World and Us" Tiny World PPT Part One Content: Review and Summary Review the learning content of this unit, think about how human observation tools have developed from ancient times to the present, and how people's observation horizons have expanded. Let's talk about two relationship between them. ..

"Use a microscope to observe the living world around you (3)" Micro World PPT teaching courseware:

"Observe the living world around you with a microscope (3)" Micro World PPT teaching courseware Part One: Questions before class 1. Move the film to the left, where will the objects under the microscope move? Move to the right 2. What does the word above look like when placed under a microscope? 3.How to make foreign...

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Update Time: 2024-11-22

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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