If you get blood drawn, the liquid that comes from your vein into the vacuum sealed container is, plainly, red. We also know why it is red, as already noted. It's red because of the red blood cells (hemoglobin). Blood does change color somewhat as oxygen is absorbed and replenished.
Darkened blood color is often observed in critically ill patients generally because of decreased oxygen saturation, but little is known about the other factors responsible for the color intensity. In addition, quantitative blood color examination has not been performed yet.
Thin blood occurs when a person has a low number of platelets. Doctors refer to the condition as thrombocytopenia. The normal level of platelets in the blood is between 150,000–450,000 per milliliter (mL) . If levels of platelets fall below 150,000/mL , it may indicate thin blood.
Blood containing a high concentration of methemoglobin is chocolate brown in color rather than the dark red of deoxygenated (venous) blood or the bright red of oxygenated (arterial) blood.
Blood changes from the standard bright red menstrual blood to brown blood or discharge when it has had time to oxidize. Brown period blood is usually normal, but there are a few cases that may require evaluation by your physician.
Black period blood has been associated with sexually transmitted infections such as chlamydia and gonorrhea. Dark brown or black discharge is occasionally accompanied by other STI symptoms such as: Vaginal discharge with an unpleasant odor. Burning while urinating.
When you're dehydrated, you lose blood volume, which causes your blood to get thicker. That makes it harder for your heart to supply that blood to your muscles. As your heart works harder to pump that blood, your heart rate increases.
Blood is always red. Blood that has been oxygenated (mostly flowing through the arteries) is bright red and blood that has lost its oxygen (mostly flowing through the veins) is dark red.
If the body receives deoxygenated blood or the lungs receive oxygenated blood, the heart will be strained or unable to meet oxygen demands in the body. Transposition of the great arteries is a congenital heart disease in which the aorta and pulmonary artery have been mismatched in their connection to the heart.
Deoxygenated blood:
Deoxygenated blood is the blood that has a low oxygen saturation in comparison to blood leaving the lungs.
Dehydration can have a substantial impact on the findings of blood tests. A falsely high reading on some common blood tests may result from the body's decreased blood volume when it is dehydrated. As a result, if you are dehydrated, your doctor may believe you have a more dangerous condition than you actually do.
The colors of arterial and venous blood are different. Oxygenated (arterial) blood is bright red, while dexoygenated (venous) blood is dark reddish-purple.
Like black blood, brown or dark red is a sign of old blood, and it may appear at the beginning or end of a period. Brown or dark red blood has not had as long to oxidize as black blood and can appear in a variety of shades.
Thick blood is caused by heavy proteins, or by too much blood in the circulation. Too many red cells, white cells, and platelets will result in blood thickening. Another cause is an imbalance in the blood clotting system.
Bright, red blood is healthy, and you'll almost always see it during some part of your period.
The good news is that while dark veins may not look the best, they don't pose an immediate hazard to your health. They can, however, indicate an increased risk of two important problems: Blood clots: the blood that pools in large veins can, under certain circumstances, clot.
Water helps to thin the blood, which in turn makes it less likely to form clots, explains Jackie Chan, Dr. P.H., the lead study author. But don't chug your extra H2O all at once. "You need to drink water throughout the day to keep your blood thin, starting with a glass or two in the morning," adds Dr.
When you drink a glass of water, it takes approximately 15 minutes for your body to absorb the fluid. However, when you're dehydrated, it can take about three times as long (45 minutes) for fluids to make their way from the stomach into the bloodstream and to the rest of the body.
Color. The color of human blood ranges from bright red when oxygenated to a darker red when deoxygenated. It owes its color to hemoglobin, to which oxygen binds.
Gray Blood
If you see gray or off-white discharge, call your doctor. Gray blood is associated with infection. Other signs of infection include fever, pain, itching, or a foul odor.
Dark red or brown period blood
It usually happens at the beginning or the end of your period, when your flow is lighter. Because the longer blood takes to leave the body, the longer it has to oxidize (read: get exposed to oxygen), which makes it dark. “It's not necessarily a bad thing at all,” said Dr.