"Blood Circulation" PPT courseware

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"Blood Circulation" PPT courseware

Part I: The pipes through which blood flows—blood vessels

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

Features: Thick pipe wall and high elasticity

Fast blood flow in the tube

Mostly distributed in deeper parts of the body

If you press your fingers on the inside of the radius in your wrist, you will feel a pulse. This is the pulsation of the radial artery.

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

Features: Thin wall, low elasticity, large lumen

Slow blood flow in the tube

There are venous valves in the veins of the limbs

Capillaries: Blood vessels that connect the smallest arteries and veins.

Features: Large quantity and wide distribution

The tube diameter is small and only allows red blood cells to pass through in a single file.

The tube wall is thin and consists of only one layer of epithelial cells

The blood flow in the tube is the slowest

Facilitate adequate material exchange between blood and tissue cells

Blood circulation PPT, part 2: the heart, the power organ of blood transportation

Location: Located in the middle of the chest, lower left, between the two lungs, shaped like a peach, about the size of my fist.

Structure: Made up of myocardium, it has four chambers: left atrium, left ventricle, right atrium, and right ventricle.

Function of the heart: It is the power organ for blood circulation.

The rhythmic contraction and relaxation of the myocardium form the beating of the heart. The myocardium contracts to push blood into the arteries and flows throughout the body; the myocardium relaxes and blood flows back to the heart through the veins.

Heart rate and cardiac output:

The number of times the heart beats per minute is called heart rate. The average resting heart rate for adults is 75 beats/minute.

Stroke volume: The amount of blood output from the ventricles to the arteries with each contraction of the heart. A normal person is about 70mL at rest.

Output per minute (also called cardiac output): The amount of blood output by the heart per minute. The heart rate is calculated as 75 beats/minute, and the output volume per minute is approximately 5250mL.

Blood circulation PPT, part 3: exercises

1. Distributed in the deep layers of the body, the tube wall is thick and elastic, and the blood flow rate in the tube is fast ( )

A. Artery B. Vein

C. Capillaries D. Arteries and veins

2. Which of the following statements about capillaries is incorrect ( )

A. It is abundant and widely distributed in the human body; it is the place where blood and tissue cells exchange substances.

B. The tube wall is extremely thin, consisting of only one layer of epithelial cells, and the blood flow in the tube is extremely slow.

C. It is a blood vessel that connects the smallest arteries and veins

D. Its inner surface has valves that prevent blood from flowing back.

3. The most developed part of the heart muscle is ( )

A. Left atrium B. Right atrium C. Left ventricle D. Right ventricle

4. The power organ of blood circulation is ( )

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

5. The blood vessel connected to the right atrium of the heart is ( )

A. Pulmonary vein B Superior and inferior vena cava C. Aorta D. Pulmonary artery

Blood circulation PPT, part 4: blood circulation pathways

Activity: Observe the blood flow in the tail fin of small fish

⒈ Wrap the ________ part of the small fish with _______ cotton wool, exposing the mouth and tail (keep dripping water on the cotton wool from time to time to keep it moist.) Place the small fish flat in the petri dish, so that the tail fin is flat against _ ________superior. After the fish settles, cover the tail fin with _______.

⒉ Place the culture dish on the stage and observe the blood flow in the caudal fin vessels using a microscope at ______ magnification. Arteries and veins can be identified based on the ________ and ________ of blood flow. If in the field of view of the microscope, it is observed that the blood in the tail fin flows toward the head of the small fish, then the blood vessel is _____________.

(Analysis: The direction of blood flow seen in the field of view is opposite to the actual direction of blood flow. The heart of the small fish is near the head, so the direction of blood flow is out of the heart, so it is an artery.)

3. In capillaries, red blood cells are arranged and flow in ______.

4. Return the small fish to the fish tank after the operation

Keywords: Beijing Normal University Edition Biology PPT courseware for seventh grade volume 2 free download, blood circulation PPT download, .PPT format;

For more information about the PPT courseware "Material Transport and Blood Circulation in the Human Body", please click the Material Transport and Blood Circulation in the Human Body ppt tag.

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"Human Blood Circulation" PPT:

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"Blood Circulation" PPT download:

"Blood Circulation" PPT Download Learning Objectives 1. Distinguish between arteries, veins and capillaries, explain the functions of different types of blood vessels, and their structural characteristics suitable for their functions. 2. Describe the structure and function of the heart, and explain the characteristics of the heart and its functions. 3.Describe the blood..

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Update Time: 2024-11-14

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