Select a Topic About Blood Blood Cells Needing Blood Blood Safety Blood History Test Your Knowledge About Blood Return to About Blood Main Page

The main function of these cells is to defend
the body against infection.
Select Your Answer Red Blood Cells White Blood Cells Platelets

These cells play an essential role in the blood
clotting process.
Select Your Answer Red Blood Cells White Blood Cells Platelets

These blood cells carry oxygen to tissues through
out the body.
Select Your Answer Red Blood Cells White Blood Cells Platelets

How many blood cells in the human body
die each second.
Select Your Answer 500,000 100,000 to 250,000 2 Million

What is the name of the process that generates
new red blood cells.
Select Your Answer Hemoglobin Oxyhemoglobin Erythropoiesis

What is the life span of red blood cells.
Select Your Answer 7 to 10 days 80 to 120 days 6 to 8 months

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