Question

human blood is red colour
given reason:​

Answer 1

Answer:

human blood is red due to presence of haemoglobin in blood

Answer 2

Answer:

Human blood is red because hemoglobin, which is carried in the blood and functions to transport oxygen, is iron-rich and red in color. ... It's bright red when the arteries carry it in its oxygen-rich state throughout the body. And it's still red, but darker now, when it rushes home to the heart through the veins.