"Use a microscope to observe the living world around you (2)" Micro World PPT courseware

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"Use a microscope to observe the living world around you (2)" Micro World PPT courseware

The main content of the cell theory is: all living things are composed of cells; cells are the most basic unit of structure and function of living organisms; all cells come from other cells.

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, inheritance, etc. of living things are all carried out through cells. Biological cells not only have diverse shapes, but also diverse functions.

Use a microscope to observe the living world around you B

Key points of this lesson:

A. All living things are composed of cells.

B. The shapes of biological cells are diverse. The cells of different organisms are different, and the cells of different organs of organisms are also different.

C. Cells are the most basic structural unit of organisms and the most basic functional units of organisms.

D. Recognize several types of cells in books

Use a microscope to observe the living world around you B

1. Fill in the blanks.

1. The establishment of the ( ) doctrine is hailed as one of the three major discoveries of natural science in the 19th century.

2. A large number of research facts show that living organisms are composed of ( ).

3. I have observed ( ), ( ), ( ) and other cells under the microscope.

4. Life cells have functions such as ( ), ( ), and ( ).

5. ( ) After the first discovery of cells, many scholars began to study cells.

judge

1. The structures of animal cells and plant cells are exactly the same. ( )

2. The stomata on the leaf epidermis are also a type of cells. ( )

3. The red blood cells in the blood seem to be transporters responsible for transporting oxygen and the produced carbon dioxide. ( )

4. Some cells can help us fight viruses and bacteria and protect our health. ( )

5. The resemblance between our appearance and our parents is also related to cells ( )

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Update Time: 2024-09-08

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