2006-07-01 23:59:13 · 15 answers · asked by freewhitestallion 1 in Science & Mathematics ➔ Medicine
Human blood, when oxygen-depleted, is in fact not red. It is a bluish color. However, exposure to air immediately changes the color to red.
Iron is one of the reasons for the color.
Now, as for the rest of this chat, you must realize that if humans were not humans, they might be bugs. And then their blood could be green, or even a creamy color. If humans were not humans, but perhaps aliens from Marizelia IV, maybe their blood would be clear - or fuschia. Maybe there wouldn't even BE any blood.
But humans are humans so why are we even discussing this? Or ARE you from Marizelia IV?
2006-07-02 00:06:23 · answer #1 · answered by Der Lange 5 · 1⤊ 1⤋
Red Blood Cells, Platelets (stained purple), a T-Lymphocyte white cell (stained green), and a Monocyte white cell (stained gold) as seen through a scanning electron microscope. ©2000 Dennis Kunkel, Ph.D.
The scientific name for red blood cells is erythrocytes. They are formed in the bone marrow and are created by a stem cell. Red cells are the most numerous of all blood cells in the blood. They are produced at a rate of 4-5 billion every hour in an adult human!
When a red cell matures, it ejects its nucleus before entering the bloodstream.
It looks like a doughnut, but without a hole in the middle. Red cells are 7-8 microns in diameter. Yet, they are the heaviest particles in the blood.
Red blood cells contain hemoglobin, a protein that carries oxygen. Oxygen is known as O2. Each time we take a breath in, we are inhaling oxygen in the air.
The role of red cells is to absorb oxygen through the little alveoli in your lungs and deliver it to all the muscles, tissues and organs in your body.
To do this, they travel through large arteries and tiny capillaries. Sometimes the capillaries are so small, the red cells have to squeeze and bend themselves in half to get through in order to release their load of oxygen!
But that's only half the trip! After they deliver the oxygen, the red blood cells pick up a waste product called carbon dioxide, known as CO2. Then they make the return trip back to the lungs through the veins where the CO2 can finally be released. The body eliminates carbon dioxide every time we breathe out! Then, the red blood cells start the trip all over again.
Rory Says: "If you're wondering how long it takes to accomplish a round-trip... it takes, on average... only 30-45 seconds! We, red blood cells have a life span of about 120 days. Then we are removed from circulation by an organ called the spleen."
The hemoglobin makes the blood cells red.
— Gerardo,
high school student
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2006-07-02 14:50:23 · answer #2 · answered by qwq 5 · 0⤊ 0⤋
"As the young red blood cell matures, and takes on an adult form in the marrow of the bone, it loses it's nucleus, and it increases its production of hemoglobin. Hemoglobin is the red pigment, or color of blood, and contains iron, combined with protein."
Blood is not blue in your veins and then suddenly turns red with the exposure to oxygen. Red blood cells carry oxygen and therefore already are oxygenized. The blue of your veins comes from the lumen on the vein, not the blood.
2006-07-02 09:05:06 · answer #3 · answered by Emerson 5 · 0⤊ 0⤋
its due to the presence of hemoglobin in blood.about 5 Lt's. of blood runs through the entire circulatory system of our body. the heart pumps this blood through the right ventricle into the lungs. when we breathe in air, it goes to the lungs. the molecules of oxygen bind with hemoglobin in blood and then the heart pumps this oxygenated blood to the other parts of the body. the other parts of the body use up the oxygen to gain energy. this de-oxygenated blood returns to the heart through the venacavas.now the oxygenated(aerated) blood flows through arteries which are deeply inserted in body. this blood is bright red in color. deoxygenated blood is slightly bluish,that can be seen in the veins which are superficially placed in the body.
2006-07-02 12:19:15 · answer #4 · answered by smarts 1 · 0⤊ 0⤋
Because as we gaze at the blood, it absorbs all other wavelengths of light and reflects that of red. Just like the reason why our sky is blue. The contents are the reason that it reflects red.
2006-07-09 00:19:34 · answer #5 · answered by PreviouslyChap 6 · 0⤊ 0⤋
Our blood is really blue until it hits the air then it turns red. Look at your veins.
2006-07-02 07:03:53 · answer #6 · answered by Zeo 4 · 0⤊ 0⤋
human blood is red due to the presence of hemoglobin which imparts red color to our blood
2006-07-02 07:09:33 · answer #7 · answered by rakesh r 1 · 0⤊ 0⤋
due to the hemoglobin in our blood. Those are the blood cells which carry oxygen.
2006-07-02 12:32:18 · answer #8 · answered by GaMe 2 · 0⤊ 0⤋
because of hemoglobins!!!! ahaha!! why the hell do you think?
and if youre asking why hemoglobins are red.. then its because red is a color which you will see the first in a human body and so you can help!!! I think its because of that..:):) first aid!!
and because it catches the attension!
2006-07-02 07:07:17 · answer #9 · answered by Anonymous · 0⤊ 0⤋
It's blue and as soon as air hits it, it turns red. This is where the word 'BlueBlood' comes from.
2006-07-03 00:54:04 · answer #10 · answered by Dis~Played 2 · 0⤊ 0⤋