"Transportation of Substances in the Body" PPT (Lesson 3)

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"Transportation of Substances in the Body" PPT (Lesson 3)

Part One: Learning Objectives

1. Outline the path of blood circulation and distinguish between arterial blood and venous blood;

2. Explain the concepts of blood pressure, pulse and heart rate, and learn the general methods of measuring them;

3. Discuss the principles of blood type and blood transfusion.

Transportation of substances in the body PPT, part 2: blood circulation

Observe and think

1. Where are the starting points and ending points of the systemic circulation and pulmonary circulation?

2. What changes occur in the components of blood in the systemic circulation and pulmonary circulation? Where are the parts that changed?

3. Write down the pathways of systemic circulation and pulmonary circulation in the book.

Some people say that arterial blood flows in arteries and venous blood flows in veins. Is this statement right? Why?

This statement is incorrect. Arterial blood refers to blood that is rich in oxygen and is bright red in color; venous blood refers to blood that is low in oxygen and is dark red in color. In the systemic circulation, arterial blood usually flows in the arteries, and venous blood flows in the veins. However, in the pulmonary circulation, venous blood flows in the pulmonary arteries, and arterial blood flows in the pulmonary veins.

Memory Tips:

In the body circulation, movement within movement, stillness within stillness;

In the pulmonary circulation, there is stillness within movement, and movement within stillness.

PPT on the transportation of substances in the body, part 3: heart rate, pulse and blood pressure

1. Heart rate: The number of times the heart beats per minute.

Different people have different heart rates. The resting heart rate of a healthy adult is about 75 beats per minute.

2. Pulse

As the heart contracts and relaxes rhythmically, the arterial walls expand and contract accordingly, forming a pulse. The pulse and heart rate of the same person are the same.

Traditional Chinese medicine diagnoses diseases based on "pulse phase".

Analyze the data obtained and summarize what is the relationship between the movement of the human body and the pulse? What happens to the pulse when exercise stops? Why did this change happen?

Pulse pulsation is related to exercise. As exercise intensity increases, the number of pulses increases.

When exercise stops, the pulse rate will decrease again.

Exercise requires energy consumption, increased nutrition and oxygen, and accelerated blood flow, so the pulse rate will increase.

PPT on the transportation of substances in the body, part 4: blood type and blood transfusion

1. Blood components

Blood cells: red blood cells, white blood cells, platelets

plasma

serum

fibrinogen

2. Blood type characteristics

People have multiple blood group systems, and the ABO blood group system is commonly used clinically.

Agglutinogens and Lectins in the ABO Blood Group System

3. Principles of blood transfusion

(1) During blood transfusion, in principle, blood of the same type should be transfused.

(2) When transfusion of heterotype blood is necessary, a cross-matching test must be performed first.

(3) According to the above principles, type O blood can be transfused to people with blood types A, B, and AB. It should also be done sparingly and slowly.

Why is type O a universal blood donor?

Blood supply mainly considers the agglutinogens of the donor's red blood cells. Because type O blood has no agglutinogens in its red blood cells, it is a universal blood donor.

Transport of substances in the body PPT, part 5: Class summary

1. Blood circulation

2. Heart rate and blood pressure

Heart rate: the number of times the heart beats per minute

Pulse: As the heart contracts and relaxes rhythmically, the arterial wall expands and retracts accordingly, forming a pulse.

Blood pressure: The pressure exerted by blood on the walls of blood vessels as it flows forward.

3. Blood type and blood transfusion

A common blood group system is the ABO blood group system.

When transfusing blood, in principle, the same type of blood should be transfused. When transfusion of heterotype blood is necessary, a cross-matching test must be performed first.

Transport of substances in the body PPT, Part 6: Classroom exercises

1. The blood flowing through the aorta is ( ), the blood flowing through the pulmonary artery is ( ), the blood flowing through the superior and inferior vena cava is ( ), and the blood flowing through the pulmonary veins is ( ).

A. Arterial blood B. Venous blood

2. The blood vessels returning to the left atrium are ( ), and the blood vessels returning to the right atrium are ( ).

A. Aorta B. Pulmonary artery

C. Pulmonary veins D. Superior and inferior vena cava

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Update Time: 2024-07-05

This template belongs to science courseware Zhejiang Education Edition Ninth Grade Science Volume 1 industry PPT template

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