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

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

discuss

1. Why does blood containing anticoagulants stratify after centrifugation or standing for a period of time? How many layers is it divided into?

Because blood contains different components and their specific gravity is different, it will be stratified. Divided into three layers.

2. Based on the above information, what parts do you think blood may be composed of? At what level should the blood components listed on the routine laboratory test sheet be listed?

3. Why is blood called a "flowing tissue"?

There are a large number of blood cells in the blood. These cells and plasma form blood and complete functions such as material transportation. Therefore, blood is a kind of tissue and is a connective tissue. Because blood can flow, it is called a flowing tissue.

When people sweat profusely or have severe diarrhea, what are the main components lost in the blood? What methods are usually used to replenish these components lost in the blood?

During heavy sweating, the blood mainly loses water and inorganic salts. Drinking water and appropriate amounts of inorganic salts are usually used to replenish these components lost in the blood.

In severe diarrhea, the human body mainly loses nutrients such as water, some inorganic salts, and glucose. Methods such as drinking water, supplementing appropriate amounts of inorganic salts, and intravenous drip (or oral) glucose solution are usually used to replenish these components lost in the blood.

knowledge chain

Characteristics of red blood cells: Easily combine with oxygen in places with high oxygen content, and easily separate from oxygen in places with low oxygen content.

think about it

Anemia occurs when there are too few red blood cells or hemoglobin in the body. What symptoms do you think someone with anemia might show? Based on the composition of hemoglobin, what should be paid attention to in the diet?

Class hours meet standards

1. (2009 Qiandongnan Prefecture High School Entrance Examination) The picture on the right is a view of a blood smear under a microscope. (Answer with the number in the picture).

①When a person is infected by bacteria and becomes inflamed, the number of ______ in the picture will increase significantly.

②When the number of ___________ in the picture decreases significantly, it will cause endless blood flow in the wound and subcutaneous bleeding in the human body.

③When the number of _______ in the picture is too small, it will cause anemia in the human body.

④The function of transporting nutrients and waste is ____________.

2. Aunt Li often has pale complexion, dizziness and fatigue. Recently, her parotid gland area has been swollen and painful. She went to the hospital for a blood test. The following are some results of Aunt Li's blood test. Please analyze and answer:

(1) The doctor diagnosed Aunt Li as suffering from acute mumps. One of the basis for the diagnosis was that she had too many ____ on the test sheet.

(2) Aunt Li’s ____ number is too low and the hemoglobin amount is too low, she may be suffering from ____ disease. In addition to taking the medicine prescribed by the doctor, she should eat more foods rich in ____ and ____ food.

According to the "Jiaxing Daily" report, some time ago, a group of soldiers in our city who returned from serving as soldiers in Tibet developed symptoms such as fatigue, weakness, chest tightness, dizziness, diarrhea, etc., as if they were drunk. In medicine, this symptom is called It's called "drunk oxygen", can you explain it?

It turns out that most people, from places with abundant oxygen at lower altitudes to plateaus with thin air, will suffer from obvious physical discomfort due to lack of oxygen. In order to adapt to this hypoxic environment, the body must seek homeostasis, that is, proliferate red blood cells in large quantities, input more oxygen into the body, and maintain the normal operation of the body. Once such a person suddenly returns to a low-altitude area from a plateau, the excess red blood cells cannot be reduced sharply immediately, and they have to continue working, causing an oversupply of oxygen in the body and producing "drunk oxygen."

discuss

1. What type of cells are most abundant in the permanent smears of human blood you observe?

The most numerous are red blood cells

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

Red blood cells are biconcave disc-shaped, red, and can be observed in large numbers without staining; white blood cells are large individual red blood cells, small in number, and require staining to be clearly observed.

3. Why can't I see platelets?

Platelets are much smaller than red blood cells and white blood cells and are very pale in color, requiring special staining to be observed.

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For more information about the PPT courseware "Transportation of Substances in the Human Body and the Flow of Tissues and Blood", please click on the "Transportation of Substances in the Human Body PPT ppt Flow of Tissues and Blood" tag.

"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" Transport of Materials in the Human Body PPT Courseware 4:

"Flowing Tissue - Blood" Transport of Substances in the Human Body PPT Courseware 4 Learning Objectives The stratification phenomenon of blood Interpretation of routine blood test sheets The composition and main functions of plasma Use a microscope to observe permanent pictures of human blood and identify red blood cells, white blood cells, and platelets Understand ..

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

"Flowing Tissue - Blood" Transport of Materials in the Human Body PPT Courseware 3 Learning objectives of this section: 1. Describe the components of blood and the main functions of each component. 2. Ability to identify red blood cells and white blood cells in human blood smears based on the shape and number of blood cells. 3. Ability to root...

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Update Time: 2024-11-14

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