Approximately, seven percent of the body's blood is in the capillaries which continuously exchange substances with the liquid outside these blood vessels, called interstitial fluid. This dynamic displacement of materials between the interstitial fluid and the blood is named capillary exchange.pproximately, seven percent of the body's blood is in the capillaries which continuously exchange substances with the liquid outside these blood vessels, called interstitial fluid. This dynamic displacement of materials between the interstitial fluid and the blood is named capillary exchange.
The Base Diet for Birds: Food That Is Balanced. In the wild, birds eat a vast variety of foods: seeds, nuts, grasses, flowers, fruits, insects, the list goes on. The change in seasons brings new types of foods, and birds nourish themselves on whatâs available.
Different types of birds eat different foods. Most birds are carnivorous meaning that they eat flesh, at least some of the time. Many birds live on insects or on fish. Some eat small reptiles and mice. Birds of prey eat mammals and other birds. Some birds are scavengers and eat the bodies of creatures that have died.