What is the primary function of the circulatory system?

• To produce energy

• To transport oxygen, nutrients, and waste products

• To control movement

• To regulate body temperature

What is the main organ of the circulatory system?

• Brain

• Stomach

• Heart

• Lungs

Which type of blood vessel carries blood away from the heart?

• Veins

• Capillaries

• Arteries

• Lymph vessels

What is the role of red blood cells?

• To fight infections

• To carry oxygen

• To regulate body temperature

• To produce hormones

What is the name of the blood vessel where gas exchange occurs?

• Arteries

• Veins

• Capillaries

• Aorta

What prevents blood from flowing backward in veins?

• Thick walls

• Valves

• High pressure

• Oxygen levels

Which component of blood helps in clotting?

• Red blood cells

• White blood cells

• Platelets

• Plasma

What type of blood is pumped from the right side of the heart?

• Oxygenated blood

• Deoxygenated blood

• Blood mixed with nutrients

• Carbon-rich blood

What is the largest artery in the body?

• Pulmonary artery

• Aorta

• Coronary artery

• Femoral artery

Which chamber of the heart pumps oxygenated blood to the body?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle