(liquid) plus formed elements (red blood cells, white blood cells, and platelets). Physical Characteristics of Blood Blood is denser and more viscous (thicker) than water, which is part of the reason it flows more slowly than water. The temperature of blood is (), about higher than oral or rectal body temperature, and it has a slightly alkaline pH ranging from 7.35 to 7.45. The color of blood varies with its oxygen content. When saturated with oxygen, it is bright red. When blood has a low oxygen…
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