Why is the blood in the veins a little redder after people enter the tropics from Europe?

To put it simply, a place with a high temperature does not need more oxygen to heat the organism to a state of temperature equilibrium, while a place with a low temperature needs more oxygen to heat up to an equilibrium state, so a place with a high temperature consumes less oxygen dissolved in the blood, and the blood carries more oxygen, so it appears bright red.

In general, oxygen concentrations are about the same across the globe, but temperature affects the chemical reactions in living organisms, and generally speaking, the temperature of living organisms is stable.

The chemical reaction of the organism releases heat to maintain the temperature of the body, etc., and after entering the tropics from Europe, due to geographical factors, the temperature in the tropics is higher, the temperature in Europe is lower, and the organism in the place where the temperature is higher only needs less oxygen to maintain the temperature of the organism to the equilibrium state, and the lower temperature in Europe leads to the consumption of more energy to maintain the balance of the body, because oxygen is an important chemical for the energy balance of the organism, so, The place with a low temperature consumes more oxygen to the heat of the chemical reaction, and the high temperature consumes less oxygen The oxygen to the heat of the chemical reaction, where the blood can dissolve the same oxygen, so the high temperature only consumes a little oxygen to get the equilibrium temperature, and the blood has more oxygen so it looks bright red.

This proves that energy conservation, that is, how much energy is needed in an organism to maintain temperature, can be obtained not only from the chemical reaction in oxygen, but also from the external environment, and the energy absorbed from the environment is equal to the energy from the chemical reaction of oxygen.

In fact, the color of blood in these places is different when it is cold and when it is hot.

I think Mai Na found this, right? He's a doctor.

The color of the blood is red or not only related to the concentration of oxygen carried, because hemoglobin has more oxygen, it is bright red, and if there is less oxygen, it is dark red.

Other effects make it difficult to change the color of hemoglobin.

Could it be that Africa has more oxygen?

There are two blood pipes in the human body, one is the artery, which is responsible for transporting the blood ejected from the heart to all organs throughout the body; The other is the veins, which are responsible for transporting blood from all organs throughout the body back to the heart. Arterial blood is fresh blood, which contains fresh oxygen for the use of body organs, because oxygen and hemoglobin in the blood can be combined into bright red oxyhemoglobin, so the blood is red, and venous blood is not fresh, because there is carbon dioxide exchanged by various organs with oxygen, so it is purple.

In addition, the arteries and blood vessels are hidden inside the body and cannot be seen from **; The venous blood vessels are very close to the **, and in some body parts, such as hands and feet, the blood vessels are almost under the skin. Therefore, the veins flowing with purple blood can be seen from the surface of ** and appear blue.

Give it to your brother and me.

In different blood vessels, blood has two colors: bright red and purplish-red, depending on the amount of oxygen it contains. When enough oxygen is absorbed in the lungs, the blood is bright red, and when the blood sends oxygen to all parts of the body, the oxygen decreases and the color becomes purple.

This purple blood turns cyan through the walls of the ** and blood vessels on the hands and feet (because ** is a little yellowish color). Bright red blood containing a lot of oxygen is deep in the blood vessels of **, and this blood vessel is not visible from the outside.

Another way of saying it.

When you look at something through a colored cellophane, the color of the object becomes different from the original color. In the same way, the blood vessels that we can see from the ** are veins, and the blood flowing in the veins is dark red, and this dark red is covered by a layer of yellow **, so it looks blue-green.

The blood in the arteries will be brighter red than the venous blood due to the oxygenated color, but the venous blood is actually red, just because the position of the veins is shallower than the arteries, so it appears blue through tissues such as **.

Are you reading the book? In order to distinguish between the veins, the veins are blue, the arteries are red, and the venous vessels are red.

The color of the blood is determined by these hemochromatins. Because of the different chemical elements contained in hemochromatin, the color of blood is also very different. Iron-containing hemoglobin is red in color, called hemoglobin, and is found in the blood, making the blood red.

The color of arterial blood is bright red, and the color of venous blood is dark red. I think you are deficient in the blood of a certain trace element.

If you don't have any symptoms of being wrong, then you are healthy, and you have a lot of oxygen in your blood, and if you are not feeling well, it means that your body is not good, and you are absorbing too little oxygen.

Venous blood is bright red and normal. Generally, arterial blood is dark red because of its high oxygen content.

Arteries contain more oxygen, veins contain more carbon dioxide, and I don't know why it's in junior high school biology books.

Because the blood in the arteries contains oxygen, and the blood in the veins does not contain oxygen, the blood in the arteries is bright red and the blood in the veins is dark red.

The color of the blood is determined by the red blood cells, which contain orange-red hemoglobin, so the blood is red. Blood with a high oxygen content, such as arterial blood, is bright red; Blood with little oxygen, such as venous blood, is purplish-red.

The oxygen content is different, arterial blood contains more oxygen, and venous blood contains less oxygen.

You're asking a question.

It should be said "Why is arterial blood bright red and venous blood dark red?" "This kind of question is more serious.

This is because the pulmonary arteries are filled with venous blood (dark red), while the pulmonary veins are filled with arterial blood (bright red).

Arterial blood contains more oxygen, and venous blood contains less oxygen.

Blood isn't red? Arteries are red and veins are blue, what is the reason for this?

This may have something to do with the flow of blood in each individual, people who don't like to move have slower blood flow, blood cells are not active, venous blood is very dark red, people who are active, blood is always in a state of movement, and venous blood is lighter in color.

Most of them are due to the gradual increase in toxins on the walls of blood vessels and the shallowness and depth of the veins. Exercise more, ensure healthy and regular sleep, drink more plain water, develop a good habit of defecating every day, and there will be less waste in the body.

Answer: When a person is hungry, the blood that leaves the intestinal wall and enters the hepatic portal vein not only cannot absorb the free glucose from the small intestine, but also needs to supply the glucose in the blood to the use of small intestinal cells for life activities.

Normally, the cells will leave the heart from the pulmonary arteries. This scenario simulates the process of blood returning from the upper body to the heart and entering the pulmonary circulation, after the blood returns from the superior vena cava to the heart, it passes through the right atrium, the right ventricle, and then pumps out of the pulmonary artery into the pulmonary circulation for oxygenation. So the answer to this question is A.

Of course, this is the state under normal physiological conditions, such as the presence of heart malformations and valvular lesions, etc., which may not be the same.

I know you're right, the arteries and veins in the lungs and the arteries and veins in other places are reversed, because the arteries are deprived of oxygen to the lungs and then turn red and return to the heart.

Either you misunderstood the topic, or the topic was wrong.

The blood circulation route includes systemic circulation and pulmonary circulation Among them, the route of systemic circulation is: left ventricle, aorta, arteries at all levels throughout the body, capillaries at all levels throughout the body, veins at all levels of the body, superior and inferior vena cava, right atrium, right ventricle After systemic circulation, the blood changes from arterial blood to venous blood; The route of the pulmonary circulation is: right ventricle, pulmonary artery, pulmonary capillaries, pulmonary veins, left atrium, through the pulmonary circulation, the blood changes from venous blood to arterial blood Therefore, the blood vessels that flow arterial blood are the aorta and pulmonary veins

Therefore, a