What is the main function of red blood cells?

• Transport oxygen

• Transport oxygen and other nutrients

• Clot the blood

• Attack microorganisms

What type of blood cells are responsible for immune defense?

• White blood cells

• Red blood cells

• Platelets

• White blood cells and platelets

What is the main liquid component of blood?

• Plasma

• Hemoglobin

• Red blood cells

• Plasta

What type of blood is considered a universal donor?

• Group O-

• Group AB+

• Group A+

• Group O+

What does hemoglobin do in red blood cells?

• Transports oxygen and gives red color to the blood

• Helps in coagulation

• Attacks bacteria

• Filters toxic substances

What is the main function of platelets?

• Clotting the blood

• Transporting oxygen

• Producing hormones

• Clotting the blood and defending against infections

How does blood circulate in the human body?

• Through arteries, veins, and capillaries

• Only through veins

• Only through arteries

• Only through the heart

What are the four main blood groups?

• A, B, AB, O

• A, B, C, 0

• A, B, AB, O+

• A, AB, 0, O-

What is the main function of the circulatory system?

• Transport nutrients, oxygen and remove waste

• Produce energy

• Regulate body temperature

• Transmit information

Where are blood cells produced?

• In the bone marrow

• In the heart

• In the lungs

• In the liver