"Flowing Tissue-Blood" Transportation of Materials in the Human Body PPT Courseware 4

"Flowing Tissue-Blood" Transportation of Materials in the Human Body PPT Courseware 4

learning target

stratification of blood

Interpretation of routine blood test sheets

Composition and main functions of plasma

A permanent picture of human blood using a microscope to identify red blood cells, white blood cells, and platelets

Learn about anemia, suppuration, and blood clotting

Bone marrow transplantation and hematopoietic stem cells

Independent Exploration 1: The Composition of Blood

Observe the layering phenomenon of blood and complete the following diagram:

Discussion: Take two test tubes, add 10ml of blood to each, add anticoagulant to one of the test tubes, and let it sit for a period of time. The results are as shown in Figure 4-1. Please answer the following questions based on the picture:

(1) The test tube with an appropriate amount of anticoagulant added is [ ], and the reason for the judgment is _______.

(2) To observe white blood cells, which part of the blood in which test tube do you think should be taken?_______.

Independent Exploration 2: The components and main functions of plasma

Complete the following questions based on the relevant content of the textbook:

(1) Plasma contains a variety of important substances necessary to maintain human life activities, and also contains some

Of the waste generated, ______ accounts for about 90%; ______ accounts for about 7%, and ______ and others account for about 3%.

(2) The main function of plasma is to carry ______ and transport ______.

Discussion: What are the main components lost in the blood when people sweat profusely or have severe diarrhea? What methods are usually used to replenish these components lost in the blood?

Experiment: Observation of permanent smears of human blood

1. Use a low-power microscope to observe the blood smear and find the object image;

2. Turn the converter and align the high-magnification objective lens with the light hole;

3. Use the fine focus screw to adjust the focus until the objective lens is clear.

think:

1. What type of cells are most abundant in the permanent smear of human blood that you observed?

2. How do you differentiate between red blood cells and white blood cells?

3. Why can’t I see platelets?

instant consolidation

1. After the blood is added with anticoagulant or sodium citrate, stratification will appear. The upper layer is light yellow translucent liquid plasma, the lower layer is red red blood cells, the middle layer is very thin, and the white layer is white blood cells and platelets. Blood without anticoagulant will coagulate, and the light yellow liquid around the plasma is serum. (Anticoagulants are added to prevent blood clotting).

2. The components of blood include plasma and blood cells. The function of plasma is to carry blood cells, nutrients and waste products.

3. Mature red blood cells have no nucleus and are rich in hemoglobin. Hemoglobin is an iron-containing protein that is red. The characteristic of hemoglobin is that it easily combines with oxygen in places with high oxygen content and is easily separated from oxygen in places with low oxygen content. , so red blood cells have the function of transporting oxygen.

4. White blood cells have nuclei and can deform, pass through capillary walls, and play a defensive and protective role. White blood cells often cause inflammation.

5. Platelets are the smallest blood cells. They have no nucleus and are irregular in shape. When the number is small, the body may bleed abnormally. When the number of platelets is too high, the body may easily form thrombus.

6. There are two forms of anemia: the number of red blood cells or the content of hemoglobin is lower than the normal value. The measure to alleviate anemia is to transfuse red blood cells into the blood for those with severe anemia. For those with mild anemia, they can eat more protein and iron-rich foods. food.

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"Flowing Tissue-Blood" Transport of Materials in the Human Body PPT Courseware 5:

"Flowing Tissue - Blood" Transport of Materials in the Human Body PPT Courseware 5 Learning Objectives: 1. The components of blood; 2. Understand the functions of plasma and blood cells. Independent learning, independent answers: 1. What tissue of the human body is blood, and what functions does it have? 2. Blood is made of...

"Flowing Tissue-Blood" Transportation of Materials in the Human Body PPT Courseware 3:

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"Flowing Tissue-Blood" Transport of Materials in the Human Body PPT Courseware 2:

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