| Category | Format | Size |
|---|---|---|
| Jiangsu Education Edition Seventh Grade Biology Volume 2 | pptx | 6 MB |
"Blood and Blood Type" PPT
Description
"Blood and Blood Type" PPT
Part One: Introduction of New Course
Why does excessive bleeding lead to death?
For patients who have lost excessive blood, why do they need timely blood transfusion instead of fluid infusion?
Why can blood tests be used to check health conditions or diagnose diseases to a certain extent?
This is all related to the composition and function of blood!
learning target
1. Describe the components of blood and the main functions of each component;
2. Observe the permanent smear of human blood and try to identify red blood cells and white blood cells;
3. Be able to simply analyze blood routine test sheets and improve analysis and problem-solving abilities.
Blood and blood type PPT, part 2: composition and function of blood
Blood is a kind of connective tissue and an important component of the human body. It flows continuously in the human body, delivering oxygen and nutrients to all parts of the body, and transporting away waste products such as carbon dioxide produced by cells.
plasma
Ⅰ.Main components of plasma
Water (about 91% to 92%)
Protein (about 7%)
Glucose (about 0.1%)
Inorganic salts (about 0.9%)
Waste (small amount)
Ⅱ.Main functions of plasma
a. Carry blood cells;
b. Transport nutrients and waste.
red blood cells
Structural characteristics: Mature red blood cells have no nucleus and are biconcave in the shape of a round cake with an average diameter of about 7.7 μm.
Main function: transport oxygen.
leukocyte
Shape: Nucleated, larger than red blood cells.
Function: It can phagocytose bacteria that enter the human body and aging or diseased cells in the body, and has defense and protective functions.
platelets
Morphological and structural characteristics: irregular shape, smallest individual, no nucleus.
Function: Hemostasis and coagulation.
Note: Too few platelets will cause abnormal bleeding; too many platelets will form thrombosis.
Blood and blood type PPT, part 3: feedback in class
1. In the blood circulation of the human body, it plays an important role in carrying blood cells, transporting nutrients and wastes ( )
A. Red blood cells B. White blood cells C. Platelets D. Plasma
2. Observe human blood smears under an optical microscope. A type of blood cell that is difficult to observe is ( )
A. Red blood cells B. White blood cells C. Platelets D. Plasma
3. When observing a blood smear, the largest blood cells with nuclei and the largest number of blood cells without nuclei are ( )
A. Red blood cells and white blood cells B. White blood cells and red blood cells
C. White blood cells and platelets D. Red blood cells and platelets
4. Iron is an indispensable raw material for the synthesis of which of the following substances ( )
A. Bile B. Plasma protein
C. Hemoglobin D. Protein of cells in the human body
Keywords: Jiangsu Education Edition seventh grade biology PPT courseware free download, blood and blood type PPT download, .PPT format;
For more information about the "Blood and Blood Type" PPT courseware, please click on the "Blood and Blood Type ppt" tab.
"Blood and Blood Type" PPT download:
"Blood and Blood Type" PPT Download Part One: The Stratification Phenomenon of Blood Extract 10 ml of fresh human blood, put it into a test tube containing a small amount of sodium citrate solution (to prevent blood coagulation), and let it sit for a while. Take a look, what happens to the blood? ..
"Blood and Blood Type" PPT courseware:
"Blood and Blood Type" PPT Courseware Part One Content: Introduction of New Lesson In ancient times, the blood was used to recognize relatives, which means that if the blood of a child and the blood of an adult can be dissolved together, it is the biological child of the parents, otherwise it is not. Is it scientific to shed blood to identify a relative? Learning Objectives 1. Name the ABO blood type..
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Update Time: 2024-06-27
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