Arterial and venous blood in the human body do not mix, which structure of the heart is involved

The function of the atrioventricular valve is only to prevent the blood from flowing from the atria to the ventricles from flowing backwards into the atrium, but the left atrium, the left ventricle is arterial blood, the right atrium and the right ventricle are venous blood, so the atrioventricular valve has nothing to do with preventing arteriovenous blood from mixing.

b There is a thick muscle separation between the atria and ventricles, so arterial blood cannot be mixed with venous blood.

c The heart and blood vessels are only connected to transport blood, and it has nothing to do with venous blood not mixing with arterial blood.

d The left ventricular wall is thicker than the right ventricle wall, which just means that the left ventricle needs to transport blood throughout the body, so it requires a lot of pressure, so the left ventricle has such thick muscles.

This prevents blood from backflowing.

B: The left and right cavities are not connected.

The heart is the "power source" of blood circulation! If you do too many of these two things, your heart may be overwhelmed.

The blood circulation of the human body is divided into systemic circulation and pulmonary circulation, the systemic circulation is the arterial blood from the left ventricle, aorta, systemic artery, capillary network, veins at all levels, superior and inferior vena cava and coronary sinus, right atrium, before the heart begins to pump blood, the left ventricular pressure continues to contract to make the pressure higher and higher, and finally higher than the aortic pressure, so the blood rushes through the aortic valve and flows to the aorta. In general, it is the blood circulation caused by the difference between the pressure generated by the contraction of the heart and the pressure in the aorta.

<> the circulation of blood in the piping system composed of the heart and all blood vessels is called blood circulation, according to the different circulation pathways, the blood circulation of Ho Song is divided into two parts: systemic circulation and pulmonary circulation The way of blood circulation can be represented as shown in the figure: that is, the blood vessels connected to the heart have pulmonary arteries and superior and inferior vena cava

So the answer is: pulmonary artery, superior and inferior vena cava.

The function of the BA atrioventricular valve is only to prevent blood from flowing from the atrium to the ventricles from backing up into the atrium, whereas the left atrium The left ventricle flows arterial blood.

Both the right atrium and right ventricle are filled with venous blood.

So the atrioventricular valve has nothing to do with preventing arteriovenous blood from mixing.

bThere is a thick muscular separation between the atria and ventricles.

Therefore, arterial blood cannot be mixed with venous blood.

c. The heart and blood vessels communicate only to transport blood.

It has nothing to do with the fact that venous blood does not mix with arterial blood.

d: The left ventricular wall is thicker than the right ventricular wall, which only means that the left ventricle needs to transport blood throughout the body, so it needs a lot of pressure.

That's why the left ventricle has such thick muscles.

The structures in the heart that hold arterial blood are (pulmonary vein) (left atrium) (left ventricle) (aorta), and the structures that hold venous blood are (superior vena cava) (inferior vena cava) (right atrium) (right ventricle) (pulmonary artery).

In fact, in this question, not only the relevant structures of the heart that contain arteriovenous blood in the independent organ are asked, but even the blood vessels connected to it are all asked

Answer: Arterial blood is oxygen-rich and bright red blood; Arterial blood vessels are blood vessels that carry blood out of the heart Venous blood is blood that contains little oxygen and is dark red in color; Venous blood vessels are the blood vessels that send blood back to the heart The difference between arterial blood and venous blood is related to the oxygen content, and has no connection with the blood vessels transported The human body turns venous blood into arterial blood through the pulmonary circulation, and arterial blood into venous blood through the systemic circulation

A: The pulmonary artery sends blood from the right ventricle of the heart to the lungs, which belongs to the arterial blood vessels, and the internal flow is venous blood, so this option is wrong.

B: The pulmonary vein is the blood vessel that transports blood from the lungs back to the left atrium of the heart, and what flows in it is through the exchange of gas in the alveoli from the venous blood with little oxygen to the oxygen-rich arterial blood Therefore, this option is correct.

C: The aorta is a blood vessel that transports blood to all parts of the body, and it is an arterial blood vessel that does not fit the topic, so the option is wrong.

D: The superior and inferior vena cava is the blood vessel that sends the blood of the whole body back to the right atrium of the heart, which belongs to the venous blood vessel In the systemic circulation, the gas exchange in the tissue makes the original oxygen-rich arterial blood become venous blood with less oxygen, so the superior and inferior vena cava flows venous blood, so the option is wrong, so choose B

<> Xie He Song: The circulation of blood in the piping system composed of the heart and all blood vessels is called blood circulation, and according to the different circulation pathways, blood circulation is divided into two parts: systemic circulation and pulmonary circulation

So the answer is: pulmonary artery, superior and inferior vena cava.

In places with high oxygen concentration, oxygen combines with hemoglobin to form oxyhemoglobin, which is bright red. The vast majority of arterial blood is oxyhemoglobin, so it is bright red. Venous blood contains little oxygen, and where oxygen concentrations are low, oxygen separates from hemoglobin, and hemoglobin that is not bound to oxygen is dark red.

Venous blood contains more hemoglobin that does not bind oxygen, so it is dark red in color. The difference between arterial and venous blood depends only on the amount of oxygen in hemoglobin and is independent of the amount of nutrients (eg, venous blood with a lot of nutrients flowing in the portal vein), the amount of metabolic end products (eg, venous blood with less metabolites flowing in the renal veins), and the name of the blood vessel (eg, arterial blood flowing in the pulmonary veins).

When the heart is beating, the atria first contract and the ventricles relax; Then the ventricles contract, and the atria relax; Then the atria and ventricles relax at the same time, and the heart completes a beat The heart is like the engine of a machine, and the power for the blood circulation in the human body in the heart and blood vessels comes from the heart's beat

Therefore, b