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
A blood count is a blood test that measures the numbers of each type of cell in your blood. It is also called a Complete Blood Count or CBC. Blood is a mixture of blood cells, salts, proteins and a watery fluid called plasma. has three main types of cells in it. The cells in your bone marrow make blood cells.