Describe the composition and physical characteristics of blood. what is the normal ph range of blood? how much blood does the average person have? what is viscosity? the temperature of blood is

Color: oxygen poor blood is dark red why? 1) Fact that we can see the blood traveling through the superficial veins through skin blood. 2) how light is reflected back to the eye from different colors.
Volume: In an adult 5L, men tend to have (5mL to 6mL) -sustaining normal blood volume is essential to maintaining blood pressure
Viscosity: 4 to 5 times more viscous than water. It changes if erythrocytes increase, and the amount of fluid decreases or both.
Plasma concentration: The relative concentration of solutes determines whether fluid move in and out of the plasma by osmosis as blood is transported through capillaries. ex. if an individual is dehydrated the plasma becomes hypertonic.
Temperature: 1 degree Celsius higher than body temapture.
Blood PH: Slightly alkaline, 7.35 and 7.45, dependent upon H+