"Transportation of Substances in the Body" PPT (Experimental Class)

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"Transportation of Substances in the Body" PPT (Experimental Class)

Part One: Anatomy of the Cow’s Heart

[Experimental goal]

1. Understand the structure of the heart.

2. Learn to understand biological organs through anatomy.

【experiment equipment】

Cow heart (or other mammalian heart as readily available)

Wax plate, scalpel, forceps, scissors.

【experiment procedure】

1. Identify the various parts of the beef heart according to their positions as shown in the picture.

2. Comparing the aorta and pulmonary veins, which blood vessel has a thicker wall?

The aorta has a thicker wall.

3. Cut the heart open along the dotted line in the picture, and then use tweezers to remove the blood clot in the heart.

4. Comparing the left ventricle and the right ventricle, which ventricle has thicker muscles?

The left ventricular muscle is thicker.

5. Use scissors to cut the walls of the aorta and pulmonary artery and observe the valves in the walls. Please try to draw the shape of the valve.

6. Find the atrioventricular valve between the atrium and ventricle and observe its valve structure.

PPT on the transportation of substances in the body, part 2: observing the blood flow in the tail fin of a small goldfish

【experiment procedure】

1. Wrap the head and body of the small goldfish with wet gauze, leaving only the tail exposed. Place it on a petri dish and cover the tail with a slide, as shown in the picture.

2. Use a low-power microscope to observe the blood flow in the capillaries of the fish tail.

3. What blood vessels did you see? Can you differentiate between arteries, veins and capillaries?

Feel the action of the venous valves.

1. On the wrist of your left hand, look for an obvious vein (commonly known as a "vein")

2. Press this vein tightly with the middle finger of your right hand.

3. Push the index finger of your right hand forcefully along the vein for a distance toward the heart, then remove the index finger while still pressing the middle finger tightly. Do not relax and observe the vein. What does the state of the veins at this time indicate? Can you explain this phenomenon?

4. Remove your middle finger and observe the veins. What does the vein status at this time indicate?

PPT on the transportation of substances in the body, part 3: classroom exercises

1. When observing the shape of the heart, pinch both sides of the heart wall with your hands. The thicker part of the heart wall is the ____ part of the heart, and the thinner part is the ____ part of the heart. There is a branch on the surface of the heart that gradually branches and goes deep. The blood vessels within the heart muscle are ________. Once the blood vessels here harden and the lumen becomes narrow, it is easy for the myocardial cells to lack ____ and nutrients, leading to ______.

2. In order to explore the flow of blood in the heart, a classmate bought a pig heart for experiments:

(1) When he injected water from the superior vena cava of the pig heart, he found that the water flowed out of _______.

(2) When he injected water from the aorta of the pig heart, he found that the water flowed out of ________.

3. Regarding the statement about normal human heart, which statement is wrong ( )

①The blood in the four chambers of the heart is all arterial blood

②The blood in the four chambers of the heart is all venous blood

③Venous blood in the atria and arterial blood in the ventricles

④Arterial blood in the atria and venous blood in the ventricles

⑤Arterial blood is in the left atrium and left ventricle, and venous blood is in the right atrium and right ventricle.

⑥Venous blood is in the left atrium and left ventricle, and arterial blood is in the right atrium and right ventricle.

A. ①②③④⑤ B. ②③④⑤⑥

C. ①②④⑤⑥ D. ①②③④⑥

Keywords: Zhejiang Education Edition ninth grade science PPT courseware free download, transport of substances in the body PPT download, .PPT format;

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Update Time: 2024-10-05

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

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