Circulatory System

Which of the following is a function of the blood?

• transport of nutrients and wastes

• transport of body heat

• defense against toxins and pathogens

• all of the above

Which of the following statements about blood is false?

• contains buffers that control pH

• normal pH is 6.8 to 7.0

• is about 55 percent plasma

• It's red

Formed elements make up about what percentage of blood?

• 55 percent

• 60 percent

• 45 percent

• 20 percent

The combination of plasma and formed elements is called

• serum

• lymph

• whole blood

• Packman blood

A typical adult hematocrit is around

• 45

• Liz

• Ashley

• pick this

Draw a heart, if you can.

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