How many liters of blood does the adult human body contain?
5 liters
10 liters
15 liters
What is the function of white blood cells?
To carry oxygen from the lungs
To fight infections
To create clots
What does it mean when there's an increase of white blood cells in the body?
There's an infection somewhere in the body
Your body just finished fighting an infection
There's no oxygen in the blood
What substance makes up the majority of plasma?
Proteins
Water
Electrolytes
What are the two components that make up blood?
Red blood cells and white blood cells
Protein and water
Cells and plasma
What is the function of platelets in the blood?
Clotting
Fighting infection
Carrying oxygen from the lungs
Where are blood cells produced?
Heart
Bone marrow
Blood vessels
Which of the following helps to remove carbon dioxide (CO2) from the body?
Red blood cells
White blood cells
Platelets
Red blood cells make up what percentage of the elements in blood?
33%
50%
90%
