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Because of the presence of hemoglobin in our blood.
Human blood is red only when it is oxygenated, meaning oxygen molecules have bound to hemoglobin in the red blood cells after the blood passed through lung tissues. Blood where no oxygen is bound to the hemoglobin will be blue in color.
Inside the body, blood leaving the lungs is bright red because it is freshly oxygenated. Blood returning from various parts of the body to the lungs will be blue because it is is devoid of oxygen.
Blood from a cut or wound is always red because oxygen in the air binds with the hemoglobin.
What else can I help you with?
What is the color of vampires who feast on human blood?
Red! Any vampire that feasts on human blood has red eyes!
What is the eye color of vampires who feast on human blood?
Red! Any vampire that feasts on human blood has red eyes!
What is the shape of the chief cells of human red blood cells?
The shape of the human red blood cells is that it is biconcave in shape.
Where Red blood cell in human body?
Red blood cells in the human body are normally contained within the blood vessels. They may be stored in the spleen, and are produced in the red marrow.
What cells can you find in human blood?
You can find red blood cells, white blood cells, and platelets in human blood.
How do the diameter and concentration of bovine red blood cells compare to human red blood cells?
Bovine red blood cells are slightly larger with a diameter of about 6-8 μm compared to human red blood cells, which have a diameter of about 6-7 μm. The concentration of red blood cells in bovine blood is lower than in human blood, with a hematocrit of around 30-35% for cows compared to 40-50% for humans.
Difference between frog from human red blood cell?
Frogs have nucleated red blood cells, whereas humans have anucleated red blood cells. This means that frog red blood cells contain a nucleus, while human red blood cells do not. Additionally, frog red blood cells are elliptical in shape, while human red blood cells are biconcave disks.
Differentiate human red blood cells to a frog red blood cell?
1) Frog's red blood cells contain a nucleus that carries all the genetic information needed to make new cells by replication. Human red blood cells contain no nuclei because they reproduce differently than frog. 2) We human have platelets in our blood but frogs do not have them.
Is Blood is bright blue when it returns to the heart?
Not in a human, no. Oxygenated blood is bright red. Deoxygenated blood is a dark red.
How come The Volturi have red eyes but they are not newborns?
The Volturi have red eyes because they choose to drink human blood, despite not being newborn vampires. Their diet of human blood results in their eyes remaining red, rather than transitioning to a golden hue like vampires who feed on animal blood.
What is the only cell in the human body that doesn't have a nucleus?
Mature red blood cells are the only human cells that do not have a nucleus. sorry to do this but that's not the answer but i don't know it
Is it true that all of the blood in your body is blue?
No. But the 'used' blood on its way back to the lungs is dull red, and looks blue through the veins.
