n. 1. Physical or mental weariness resulting from effort or activity. 2. Something, such as tiring effort or activity, that causes tiredness or weariness: the fatigue of a long hike. 3. Physiology The decreased capacity or complete inability of an organism, organ, or part to function normally because of excessive stimulation or prolonged exertion. 4.
blood - the fluid (red in vertebrates) that is pumped through the body by the heart and contains plasma, blood cells, and platelets; blood carries oxygen and nutrients to the tissues and carries away waste products; the ancients believed that blood was the seat of the emotions
Blood is a liquid that circulates through the body via a pathway of blood vessels, arteries and veins, carrying nutrients, oxygen, antibodies and other necessities of life to every cell and tissue throughout the entire body.Blood is also the means by which waste and waste byproducts are removed from the cells.f course, we donât have little vehicles speeding through our veins, so how does blood do this? Whole blood is made up of red blood cells, white blood cells and platelets, all which are suspended in a fluid called plasma. Each of these components of our blood has a very specific and important job.