The normal temperature of human blood is roughly 98.6 degrees Fahrenheit, also known as "blood heat." This is also the normal body temperature for humans, although the temperature fluctuates by as much as one degree throughout the day. Blood gets closer to the skin to shunt excess heat, and blood vessels constrict to draw more body heat inward when the body gets too cold.Continue Reading
Muscle activity generates more heat in the body and keeps the body warm. This is why humans involuntarily shiver. This may also explain the phrase "get the blood pumping" to increase body heat.
Body temperature, and therefore blood temperature, can be measured many ways. The most common method is through the mouth or armpit. Temperature can also be measured on the ear, forehead or in the rectum.
When blood is stored after someone donates a pint of blood at a blood collection center, it is kept at a temperature of 6 degrees Celsius, or 42.8 degrees Fahrenheit, for up to 42 days in cold storage until the blood is needed. Blood platelets are stored at room temperature in agitators for up to five days. Blood plasma and cryoprecipitate are frozen and stored for up to one year.Learn more about Blood
Blood viscosity is in no way affected by the heat or cold of the surrounding environment, so blood does not thin in hot weather. Experiences of extreme temperatures differ from the effect they have on the blood and other internal anatomical elements of the human makeup.Full Answer >
Different components of human blood are replaced at different rates. According to the AABB, a non-profit organization that represents organizations that conduct blood transfusions, plasma is replaced within a few hours of a blood donation while the red blood cells take a few weeks to replace. Doctors usually only remove about one pint of blood during a transfusion, which represents about 10 percent of the total blood volume.Full Answer >
Owing to its iron content, human blood smells like metal to many people. In fact, when people rub their skin along certain iron-containing objects, such as coins, perspiration reacts with the iron to produce a metallic smell, according to LiveScience.com.Full Answer >
A study published in the International Journal of Legal Medicine reported that a blood drop on a hard surface in a typical indoor setting at 20 degrees Celsius is completely dry in 60 minutes. Increasing the temperature to 24 degrees Celsius reduces the drying time to only 30 minutes.Full Answer >