Understanding the Circulatory and Respiratory Systems

What is the primary function of the circulatory and respiratory systems?

• To enhance physical strength

• To support the digestive system

• To ensure the body's homeostasis

• To maintain body temperature

What are the three main structures of the circulatory system?

• Arteries, veins, and capillaries

• Heart, lungs, and kidneys

• Heart, arteries, and veins

• Heart, blood vessels, and blood

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

• Veins

• Capillaries

• Arteries

• Bronchioles

What happens in the capillaries?

• Blood is oxygenated

• Infection is fought

• Blood clots form

• Oxygen and nutrients are exchanged

What is the main job of red blood cells?

• To clot blood

• To fight infection

• To transport oxygen

• To carry nutrients

Which cells are responsible for fighting infection?

• Capillaries

• Platelets

• White blood cells

• Red blood cells

What is the main role of platelets?

• Fighting infection

• Transporting oxygen

• Forming blood clots

• Carrying nutrients

How many chambers does the heart have?

• Eight

• Two

• Four

• Six

Through which vein does deoxygenated blood enter the heart?

• Jugular vein

• Aorta

• Vena cava

• Pulmonary vein

What is the largest artery in the body?

• Pulmonary artery

• Aorta

• Vena cava

• Carotid artery