2. A functionally similar fluid in animals other than vertebrates; such as, the juice or sap of certain plants.
3. A vital or animating force; such as, lifeblood.
4. One of the four humors of ancient and medieval physiology, identified with the blood found in blood vessels, and thought to cause cheerfulness.
In humans, this usually rises when blood cells from one dizygous twin mixes with the co-twin in utero; the organ in a woman’s body where babies develop before birth.
The type of blood depends on the presence, or absence, of certain substances on red the blood cells. Blood types are inherited.
In blood transfusions, the people giving and those receiving the blood must belong to the same blood type (blood group), or a dangerous reaction will take place from the agglutination that occurs when blood of a different group is present.
One exception is that group 0 Rhesus-negative blood can be used in an emergency for anyone.
The electric blood warmer includes a container with an electric heater and space for the insertion of a disposable blood-warming bag composed of parallel plastic tubes.
Sometimes, determining whether a patient has colorectal (colon and rectum) cancer is done by testing the occult blood in the feces of those who are suffering from some ailment but who do not show any obvious symptoms or indications of what is actually causing their discomfort.
The blood is transported throughout the body by the circulatory system.
Blood functions in two directions: arterial and venous. Arterial blood is the means by which oxygen and nutrients are transported to body tissues while venous blood is the means by which carbon dioxide and metabolic by-products are transported to the lungs and kidneys, respectively, for removal from the body.
It was believed this would correct imbalances in the blood that caused disease.