Approximately a quarter of the cells in the human body are red blood cells.
Mature red blood cells are flexible and oval biconcave disks. They lack a cell nucleus and most organelles, in order to accommodate maximum space for hemoglobin; they can be viewed as sacks of hemoglobin, with a plasma membrane as the sack. Approximately 2.4 million new erythrocytes are produced per second in human adults. The cells develop in the bone marrow and circulate for about 100–120 days in the body before their components are recycled by macrophages. Each circulation takes about 20 seconds. Approximately a quarter of the cells in the human body are red blood cells. Red blood cells make up almost half of the blood's volume (40% to 45%).
More Info:
en.wikipedia.org
What are your thoughts on this subject?
52 Comments
Nicole Toma-Tolman
They make up 45% of the volume of blood itself. But, as a whole, they make up a quarter of all the cells in our entire body.
Elizabeth Buehler-Miller
From Healthline:
Red blood cells (RBCs) are by far the most abundant type of cell in the human body, accounting for over 80 percent of all cells.
From Medical News Today:
The majority of the cells in our bodies are actually red blood cells. Although they make up over 80 percent of our body in number, they constitute only around 4 percent of total body mass.
From biology.stackexchange:
According to this answer, there are 2.63 × 10^13 red blood cells, which is 70.69% of the 3.72 × 10^13 total human cells in the estimate.
THE ANSWER IS FALSE.
Donna Smith
I got the incorrect answer because the wrong answer was CORRECT..So I should have . gotten the answer ...Looks like Quiz Club should UPDATE THEIR INFO.
pdeloriol
Elizabeth Buehler-Miller, my wife is a consultant doctor, specifically of blood diseases - she should know.
llalflin
wrong answer 45% is not a quarter
Steve
Approximately 40-45% of cells are red. A quarter is 25%
You need to check these facts before submitting questions.
Chris Brown
Yes. Just over 40% approximately. The person who submitted this question is obviously mistaken.
Brenda Wilson
Answer is wrong. Closer to 45%
Sybilla
I will add my voice to the clamour. The given answer is INCORRECT.
Elizabeth Buehler-Miller has given us the correct answer.
pykim
I agree with Elizabeth Buehler-Miller.
Chuck Donelson
45% is a long way from 25%
philrea
Knew this as a blood donor for more than 40 years. Now give plasma donations, apparently they are very good at saving lives and have saved over 800 lives, so people donate blood if you can.
dsneed
tesla alset, 👍
dsneed
I like to go to the phlebotomist to see the liquid that only MY body can manufacture. Yeah sure your body is capable of creating your own, but mine is unique. Made it myself don't cha know. Yay me.
cathie
I thought it more than that
Jim Adams
The body is nearly 85% water, even our blood is mostly water discounting nerve, muscle, skin, tissue and numerous other types of cells. I find it hard to believe red blood cells take up that much of our body.