"Pipelines for Blood Flow - Blood Vessels" PPT courseware on the transportation of substances in the human body

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"Pipelines for Blood Flow - Blood Vessels" PPT courseware on the transportation of substances in the human body

Types of blood vessels

Blood vessels range from thick to thin, just like roads in a city. All blood vessels in the human body can be connected up to ____ kilometers in length, which can circle the earth ____.

Experiment: Observe the blood flow phenomenon in the tail fin of small fish

Method steps:

1. Wrap small fish

Wrap the gill cover and trunk of the small fish with soaked gauze, exposing the tail

2. Place small fish

Place the small fish on its side in the petri dish, with the tail fin flat against the bottom of the petri dish (the fish head is facing forward)

3.Observe

Place the culture dish on the stage and use a low-power microscope to observe the red blood cells passing through the blood vessels and the blood flow speed.

Notice:

1. Keep the gills of small fish moist;

2. Make the tail fin flat on the petri dish;

3. Keep the stage and lens clean.

Self-study thinking questions

1. What are the differences between arteries, veins and capillaries in terms of blood pressure, wall thickness, elasticity and blood flow velocity?

2. Find out the functions of arteries, veins and capillaries.

3. What are the special structures on the inner surface of veins in human limbs? What does it do?

4. Observe the picture on page 58 and explain how capillaries exchange substances with blood? What characteristics does it have that are suitable for material exchange?

artery

Blood vessels that carry blood from the heart to various parts of the body.

vein

Blood vessels that carry blood from various parts of the body back to the heart.

Pipe wall _____, elastic _____

Intratubular blood flow velocity_____

The inner surface of the veins of the limbs usually has _____, and its function is___________.

capillaries

Blood vessels connecting the smallest arteries and veins.

The wall of the tube is _____, made only of ______________.

The diameter of the tube is ______, allowing only red blood cells to pass through.

Intratubular blood flow velocity_____

Capillary bleeding:

The blood is red and the volume is small, and bleeding usually stops naturally due to blood coagulation.

Treatment method: Disinfect the wound first, then wrap it with sterile gauze

Arterial bleeding:

The blood is bright red, and the blood flow is rapid and jet-like.

First aid method: Apply tight pressure to the proximal end of the injured area or tie it with a tourniquet

Venous bleeding:

The blood is dark red and the blood volume is moderate

Treatment method: Press the distal end of the injured vein

In-person training one

1. The blood vessels in the human body are divided into ____, _____ and ________.

2. The thickest pipe wall is _____, and the thinnest pipe wall is _______, which is composed of only one layer of ___________.

3. The fastest blood flow is ______, and the slowest is ______.

4. The smallest diameter pipe is ______, which only allows ______ to pass in one line.

5. A blood vessel with a valve inside the tube is _____, and its function is ____________.

6. _____ is a blood vessel that transports blood from the heart to all parts of the body. It branches continuously and becomes thinner and thinner to form _______. ______ transports blood from all parts of the body back to the heart.

In-person training 2

1. The "cut" in "looking, smelling, asking, and feeling" in Chinese medicine refers to counting the pulse. The pulse here is ( )

A. Capillaries B. Veins

C. Arteries D. Meridians

2. For "dialysis injection" infusion, the blood vessel that the drug directly enters is _______; for intramuscular injection, the first blood vessel that the drug enters is _______.

3. There is a long isolated rabbit blood vessel with branches. Water is poured in from the thicker end, but the water cannot flow out from the thinner end. Then this blood vessel may be ( )

A. Veins B. Capillaries

C. Small arteries D. Large arteries

4. During an outing, a classmate accidentally fell and was injured. The wound was bleeding. The blood was dark red and the blood flow was slow. Which rescue measure do you think should be adopted first ( )

A. Rush to the hospital

B. Press the distal end of acupressure

C. Wrap with gauze after disinfection

D. Tie the proximal end of the tourniquet

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For more information about the PPT courseware "Pipes and Blood Vessels for Transporting Substances in the Human Body and Blood Flow", please click on the Pipes and Vessels for Blood Flow ppt tag.

"Pipelines for Blood Flow - Blood Vessels" Transportation of Materials in the Human Body PPT Courseware 5:

"Conduits of Blood Flow - Blood Vessels" Transport of Materials in the Human Body PPT Courseware 5 Learning Objectives: 1. Characteristics and functions of arteries; 2. Characteristics and functions of veins; 3. Structure and functions of capillaries. Guiding questions: Observe the pictures of three types of blood vessels and think about them in conjunction with the book: 1..

"Pipelines for Blood Flow - Blood Vessels" Transportation of Materials in the Human Body PPT Courseware 4:

"Pipelines for Blood Flow - Blood Vessels" PPT Courseware for Transport of Materials in the Human Body 4 Learning Objectives: 1. Characteristics and functions of arteries; 2. Characteristics and functions of veins; 3. Structure and functions of capillaries. Guiding questions: Observe the pictures of three types of blood vessels and think about them in conjunction with the book: 1..

"Pipelines for Blood Flow - Blood Vessels" Transportation of Materials in the Human Body PPT Courseware 3:

"Conduits of Blood Flow - Blood Vessels" Transport of Materials in the Human Body PPT Courseware 3 Teaching Objectives: 1. Describe the structure and functional characteristics of arteries, veins and capillaries. 2. Try to distinguish between these three types of blood vessels and the flow of blood within these three types of blood vessels. The heart and blood vessels throughout the body...

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Update Time: 2024-10-07

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