Understanding Blood and Red Blood Cells

What are the main components of blood?

• Red blood cells, white blood cells, platelets, and carbon dioxide

• Red blood cells, white blood cells, plasma, and oxygen

• Red blood cells, white blood cells, platelets, and water

• Red blood cells, white blood cells, platelets, and plasma

Where are red blood cells produced?

• In the liver

• In the heart

• In the lungs

• In the bone marrow

How long do red blood cells typically live in the bloodstream?

• 90 days

• 60 days

• 150 days

• 120 days

What is the primary function of hemoglobin in red blood cells?

• To produce energy

• To fight infections

• To carry oxygen

• To transport nutrients

Why do red blood cells have a biconcave shape?

• To enable them to store more nutrients

• To provide a large surface area for oxygen absorption

• To allow them to divide easily

• To increase their flexibility