"Basic Structure and Function of Cells" PPT courseware

Description

"Basic Structure and Function of Cells" PPT courseware

Part One: Situation Import

Scientific research shows that in the biosphere, some organisms have only one cell, such as Chlamydomonas and Paramecium. Most living things are made up of many cells. It can be seen that cells are the structural and functional units of organisms. So, how to observe and study the cellular structures that make up living organisms?

learning target

1. Practice making and observing temporary mounts of human oral epithelial cells.

2. Use a microscope to observe the morphology and structure of animal cells.

3. Initially learn to draw cell structure diagrams.

PPT on the basic structure and function of cells, part 2: use of microscopes

Explore theme one

How to use an optical microscope

1. Structural name and function of microscope

2. Practice using a microscope

(1) Taking the mirror and placing it

Hold the mirror arm with one hand, support the mirror base with the other hand, and place the microscope slightly to the left of the experimental table.

(2) Aiming at the light

(3) Place the slide specimen and adjust the focus

(4) Observation

(5) Close the shot

3. Animal cells all have cell membranes, cytoplasm and nuclei.

Use a sterilized toothpick to gently scrape the inner wall of your cleaned mouth a few times.

Place the chipped end of the toothpick in a drop of saline on the slide and smear it a few times.

Use tweezers to pick up the coverslip so that one side of it touches the droplet on the slide first, and then slowly covers the droplet.

Basic structure and function of cells PPT, Part 3: Structure of plant cells

Explore theme two

Plant cells have cell walls, cell membranes, cytoplasm and nuclei

The cell wall is the outermost layer of plant cells and is a transparent thin wall. It is mainly composed of cellulose, with large pores through which material molecules can pass freely. The cell wall supports and protects the cells.

It has the function of protecting and controlling the entry and exit of substances into cells: it neither allows useful substances to leak out of cells at will, nor allows harmful substances to easily enter cells.

The cytoplasm is not solidified and static, but moves slowly. Many life activities are completed in the cytoplasm.

The chloroplasts contain pigments such as chlorophyll. During the ripening process of some fruits, the chloroplasts turn into chromoplasts, causing the fruits to appear in various colors. Photosynthesis of green plants takes place in chloroplasts.

1. Unique structure of plant cells

2. The fluid filled in the vacuole is called cytosol

3. Vacuoles can keep cells in an expanded state

Nucleus The cytoplasm contains an approximately spherical nucleus, usually located in the center of the cell, and contains fine structures such as chromatin. The genetic material (DNA) used by organisms for seeding is present on the chromatin. The nucleus controls the vital activities of the cell.

PPT on the basic structure and function of cells, part 4: training to meet standards

1. The onion epidermal cells observed under the microscope are relatively regular and polyhedral cells. What is the main structure that allows the cells to maintain this regular shape? ____________

2. What is the structure that allows beneficial substances to enter but prevents harmful substances from entering? __________

3. What is the juice that comes out when we eat watermelon? From which structure in the cell? __________________

4. Where is the main place for life activities in cells? What are the structures related to photosynthesis and respiration of plants in this structure? _____________

5. In what structure of the cell does genetic material exist? ___________

Keywords: Beijing Normal University version of the seventh grade biology PPT courseware for free download, basic structure and function of cells PPT download, .PPT format;

For more information about the "Basic Structure and Function of Cells" PPT courseware, please click on the Cell ppt Basic Structure and Function of Cells ppt tag.

"Basic Structure and Function of Cells" PPT:

"Basic Structure and Function of Cells" PPT Part One Content: Question Discussion Questions: 1. Which of the pictures you observed are living things and which are not? 2. What are the common characteristics of living things? Discuss why diverse living things show similar characteristics Life characteristics..

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Update Time: 2024-07-31

This template belongs to biology courseware Beijing Normal University Edition Seventh Grade Biology Volume 1 industry PPT template

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