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Blood is red because it contains red blood cells.

Red blood cell - Wikipedia

en.wikipedia.org/wiki/Red_blood_cell

Red blood cells (RBCs), also called erythrocytes, are the most common type of blood cell and .... Band 3 – Anion transporter, also an important structural component of the red blood cell cell ...

If Blood Is Red, Why Do Veins Look Blue? | Mental Floss

mentalfloss.com/article/24249/if-blood-red-why-do-veins-look-blue

Mar 19, 2010 ... After your blood is pumped to your lungs by your heart, it's bright red ... inability to penetrate as deeply as red light makes the veins appear blue.

What makes blood red? | Reference.com

www.reference.com/science/blood-red-296fb8cb15832643

Another way of explaining why humans have red blood is that the color is due to hemoglobin, which is the protein associated with iron that makes blood...

Iron Makes Our blood red - Making the Chemical Connection at the ...

www.chemicalconnection.org.uk/chemistry/topics/view.php?topic=2&headingno=5

Iron Makes Our blood red. In our red blood cells, we have a protein called haemoglobin. Each haemoglobin protein contains 4 iron atoms that bind to oxygen.

What is the difference between red blood and dark red blood in the ...

www.quora.com/What-is-the-difference-between-red-blood-and-dark-red-blood-in-the-human-body

Human blood is red, ranging from bright red when oxygenated to dark red when not. It owes its ... This dark red blood also contains metabolic wastes that makes it look darker where red blood is “clean” blood. 2.2k Views · Answer requested by.

Why is blood red? - UCSB Science Line - University of California ...

scienceline.ucsb.edu/getkey.php?key=2419

Blood is red because it is made up of cells that are red, which are called red blood cells. But, to understand why these cells are red you have to study them on a ...

Why dose blood turn red when it touches the air? - UCSB Science Line

scienceline.ucsb.edu/getkey.php?key=1329

Blood is actually red all the time, but different colors of red. When you see blood outside the body it is usually a dark red. This blood is from the veins. Sometimes  ...

If Blood Is Red, Why Are Veins Blue? - Live Science

www.livescience.com/32212-if-blood-is-red-why-are-veins-blue.html

Oct 16, 2012 ... Blood is always red, and veins look blue because the skin filters light wavelengths differently. ... What makes it back to your eye is the blue light.

If Blood Is Red, Why Are Veins Blue? | Wonderopolis

wonderopolis.org/wonder/if-blood-is-red-why-are-veins-blue/

Oxygen-rich blood is bright red as it leaves the heart. When it returns in veins ... through human tissue. This also contributes to veins appearing blue despite the dark red blood within them. ...... What Makes a Food Super? #1832. Are There ...