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Hemoglobin (iron) gives color to the blood cells which are called red blood cells

hemiclobian

hemoclobian cell

Blood is red because of the hemoglobin in the blood. It gives it the coloring of it.

Hemoglobin, the main protein in red blood cells, turns bright red upon contact to oxygen. Accordingly blood in arteries is bright red, blood in veins red-blue.

Blood is a liquid. In humans, as with many other animals, oxygenated blood (the blood that is carrying a lot of oxygen) is bright red. De-oxygenated blood (the blood that has given away most of its oxygen) is a darker shade of red.

because of hemoclobian cell

Red blood cells, the ones that carry oxygen from the lungs to the rest of the body, make blood red. Their oxygen carrying is made possible by the protein hemoglobin, which is red because it contains iron. When a red blood cell is full of oxygen it is very red; this is why arterial blood, which has recently been to the lungs, is very red, but veinous blood, which has given its oxygen to body cells, is bluish.

blood is red because of redblood corpuscles(RBC)presentin blood.it carries oxygen from lungs and flows through arteries

Red blood cells, or corpuscles, encased in blood vessels, color the blood. Since there are about 35 trillion of these tiny, round, flat discs circulating in one's body at any one time, their sheer number necessarily lends their red color to the blood.The blood flowing through the arteries, capillaries, and veins of our bodies contains many different materials and cells, each with a different function. Plasma, the liquid portion of the blood, comprises more than half of the blood. Plasma is light yellow in color, and is thicker than water, because it contains many substances, in addition to the actual blood cells. These substances include proteins, antibodies that combat disease, fibrinogen, which helps blood clot, carbohydrates, fats, salts, and others.When blood passes through the lungs, oxygen piggybacks on the hemoglobin of the red cells. From there, the red cells carry the oxygen through the arteries and the capillaries to all other cells of the body. Carbon dioxide from the body cells returns to the lungs through the veins in the same manner, by attaching to the hemoglobin.Red blood cells have a life expectancy of approximately four months, before they are broken up, primarily in the spleen, and are replaced by new red blood cells. New cells are continuously generated to replace the old cells that have past their prime, and have been destroyed to make room for the younger generation.

That happens to be the frequency of radiation emitted by the iron ion in haemoglobin.
Because of haemoglobin, the molecule that carries oxygen around, which is held in the red blood cells. in the haemoglobin is an atom of iron which can be in an oxidised state, i.e with an atom of oxygen attached to it, making it red, or in a non oxidized state, when it is blue.
Haemoglobin is pumped through the lungs, where it is oxygenated then on around the body to where the oxygen is required When the oxygen is used up the haemoglobin is routed back via the veins, and then back through the lungs again.

Actually, the reason arterial blood, which has just a little more oxygen in it than does venous blood when it leaves the lungs to circulate through the body, appears bright red is that the combination of iron, oxygen, and hemoglobin absorbs higher energy wavelength light (blue and green) which leaves the red wavelengths available for our eyes to sense.

The venous blood is never blue, it is always just a darker color of red, a burgundy or maroon color of red, the reason for it to be a darker red is because it has slightly less oxygen but much more because it carries "waste" away from the body tissues and back to the kidneys for filtering. This "waste" darkens the red color of the blood (think of it as dirty blood).

It is not correct to say that by being back in contact with air venous blood instantly oxygenates and turns red and therefore always appears red outside the body. That is a myth. It is red inside the body as well. When you look at unopened veins inside the body, in endoscopy, for example, they are a dark red color. And the blue appearance of the veins through the skin is a factor of the skin itself. It is an optical property of the reflection of light off light colored skin and the difference in that reflection from the veins under the skin (but near the surface). I'll not go into the complexities of that optical process but the blue-looking veins are mostly all about the skin and reflection. If arteries were visible through the skin (they are too deep), then they, too, would have a blueish appearance the same as the veins for the same reasons.

The presence of HB or hemaglobin give blood its red color.

Blood os actually blue. It turns red because it reacts with oxygen, which causes it to change color.

Hemoglobin, the main protein in red blood cells, turns bright red upon contact to oxygen. Accordingly blood in arteries is bright red, blood in veins red-blue.

Red blood cells, or corpuscles, encased in blood vessels, color the blood. Since there are about 35 trillion of these tiny, round, flat discs circulating in one's body at any one time, their sheer number necessarily lends their red color to the blood.

presence of hemoglobin

Due to the presence of Hemoglobin

hemoglobin is the reasons for red blood

Hemoglobin gives red color to the blood cells which are called red blood cells

Red is any of a number of similar colors evoked by light consisting predominantly of the longest wavelengths of light discernible by the human eye, in the wavelength range of roughly 630–740 nm.[2] Longer wavelengths than this are called infrared (below red), and cannot be seen by the naked human eye. Red is used as one of the additive primary colors of light, complementary to cyan, in RGB color systems. Red is also one of the subtractive primary colors of RYB color space but not CMYK color space.

blood is red because of redblood corpuscles presentin blood and it carries oxygen from lungs and flows through arteries

blood is red due to the presence of heamoglobin content in the blood

Hemoglobin present in blood gives color to the blood cells which are called red blood cells.

due to haemoglobin