In terms of tissue classification, blood is classified as 1.____ because it has living blood cells, called 2.___, suspended in a nonliving fluid matrix called 3.___. If a blood sample is centrifuged, the heavier blood cells become packed at the bottom of the tube. Most of this compacted cell mass is composed of 4.___, and the volume of blood accounted for by these cells is referred to as the 5.___. The less dense 6.___ rises to the top and constitutes about 45% of blood volume. They are so called "buffy coat" composed of 7.___ and 8.___ is found at the junction between other two blood elements. The buffy coat accounts for less than 9.____% of blood volume. Blood is scarlet red color when it is loaded with10.___; otherwise, it tends to be dark red.
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