It loses oxygen!
the blood cells begin to break apart so it eventually turns a shade of brown
Red blood cells need oxygen. Oxygen is what gives blood that bright red color. When blood is lacking oxygen, it turns dark and that's why people turn purple or blue.
It is the same reason a person's blood turns black when it is on the outside of the body. When blood cells are exposed to the air, they become deoxygenated, dry up and turn dark.
no at least not under normal conditions.
Oxygenated blood is bright red; deoxygenated blood is dark red.
A scab turns dark primarily due to the oxidation of hemoglobin in the blood that has pooled in the dried wound. As the blood dries and exposure to air occurs, the red blood cells break down, leading to the formation of dark pigments. Additionally, the presence of proteins and other substances in the dried blood can contribute to the scab's dark appearance. This process is a natural part of healing as the body works to protect the wound underneath.
The red blood cells themselves do not take any action to get more oxygen, but the kidneys sense a lack of oxygen and produce more erythropoietin (hormone responsible for producing red blood cells) and this in turn increases oxygen levels
They turn purple and die
Dark blood is blood from which the oxygen has been depleted. Once it is filled with oxygen again (in the lungs), it becomes lighter in color.
it would turn a dark color green
Exercise sends antibodies and white blood cells (the body's defense cells) through the body at a quicker rate. As these antibodies or white blood cells circulate more rapidly, they could detect illnesses earlier than they might normally. The increased rate of circulating blood may also trigger the release of hormones that "warn" immune cells of intruding bacteria or viruses.
One microliter of blood contains approximately 5 million red blood cells.