Question

why blood is red in colour​

Answer 1

Explanation:

Human blood is red because of the protein hemoglobin, which contains a red-colored compound called heme that's crucial for carrying oxygen through your bloodstream. ... That's why blood turns bright cherry red when oxygen binds to its iron.

Answer 2

Answer:

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Blood is red because of the hemoglobin inside our red blood cells.Hemoglobin is a protein that forms a complex with iron molecules and together they transport oxygen molecules throughout the body.

What is Hemoglobin ?

Hemoglobin is a protein found in red blood cells. It gives blood its red color, and its job is to carry oxygen throughout your body.