"Pipelines for Blood Flow - Blood Vessels" Transportation of Materials in the Human Body PPT Courseware 2

Description

"Pipelines for Blood Flow - Blood Vessels" Transportation of Materials in the Human Body PPT Courseware 2

Think about it:

When we feel unwell and go to the hospital, sometimes the doctor will ask us to do a blood test and, if necessary, infusion treatment. Have you ever noticed where the needle is usually inserted during a blood test or infusion? And where should I feel the pulse?

Learning Content:

1. Characteristics and functions of arteries

2. Characteristics and functions of veins

3. Structure and function of capillaries

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

Features:

①The distribution is deep,

②The tube wall is thick and elastic

③The blood flow in the tube is fast.

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

Features:

①The distribution is shallow, and the “green veins” usually seen are veins.

②The tube wall is thin and elastic.

③The blood flow in the tube is slow.

④Cannot pulsate

⑤Have venous valves (the inner surface of the veins in the limbs usually have venous valves to prevent the backflow of blood)

Compliance testing

1. Observe the blood flow in the tail fin of the small fish. You can see that the capillaries are _____, the blood flow speed is ______, and the blood cells are passing through it _______.

2. Read the picture (the arrow indicates the direction of blood flow):

In the picture, A is a _____ blood vessel; B is a _____ blood vessel; C is a _____ blood vessel.

Selected exercises:

1. The direction of carbon dioxide diffusion in the human body is ( )

A. Venous blood → tissue cells → alveoli

B. Tissue cells → venous blood → alveoli

C. Alveoli → venous blood → tissue cells

D. Alveoli → tissue cells → venous blood

2. The place where substances are exchanged between blood and tissue cells is ( )

A. Heart B. Arteries C. Veins D. Capillaries

3.The function of venous valves is ( )

A. Protect vein walls B. Prevent blood from flowing back

C. Accelerate the flow of blood D. Reduce the pressure of blood on the vein wall

4. Short answer questions

When nurses in the hospital give patients infusions, they often tie the patient's upper arm with a rubber tube first, and wait until the blood vessels on the forearm protrude before injecting the needle into place. Do you know the reason?

At this time, the principle of venous valves to prevent blood from flowing back is used. During infusion, intravenous injection is used. When the rubber band is tightened around the wrist, the blood cannot flow to the arm. At the same time, the venous valves prevent the blood from flowing back, so that the blood stays in the muscles and blood vessels of the arm. In the center, the blood vessels bulge, making it easier to insert the needle accurately.

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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 Blood Vessels for Transport of Substances in the Human Body PPT 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:

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

"Pipelines for Blood Flow - Blood Vessels" Transport 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: 2024-07-06

This template belongs to biology courseware People's Education Press seventh grade biology book volume 2 industry PPT template

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