Blood is the life-giving fluid that delivers ___________ to the cells of the body.
Oxygen
Nitrogen
Carbon dioxide
Every living organisms in the world have red colored blood.
True
False
All blood cells originate from hematopoietic stem cells.
Correct
Wrong
How many nucleus are present in the red blood cells?
Two
Three
No nucleus
Who actually has about one cup of blood in his body?
A newborn baby
A cancer patient
Old people
Red blood cells live about how many days in the circulatory system?
100 days
120 days
500 days
Giving blood will decrease your strength.
True
False
There are how many red blood cells in two to three drops of blood?
One million
Two million
One billion
Up to 3 lives are saved by _________ pint of donated blood.
One
Two
Three
Exposing a person's skin to the sun's rays reduces blood pressure by causing levels of to rise __________ in the blood.
Nitric oxide
Oxygen
Carbon monoxide
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