Understanding the Circulatory System

What is the primary function of the circulatory system?

• Producing hormones

• Transporting nutrients

• Storing energy

• Digesting food

What color is human blood inside the body?

• Always red

• Blue

• Green

• Colorless

Which cells in the blood help fight infections?

• Plasma cells

• Platelets

• White blood cells

• Red blood cells

What is the main role of platelets?

• Transport oxygen

• Fight infections

• Help in clotting

• Regulate temperature

Which vessels carry oxygen-poor blood to the heart?

• Arteries

• Veins

• Aorta

• Capillaries

Which part of the heart has thicker walls?

• Ventricles

• Atria

• Valves

• Septum

What is the role of the tricuspid valve?

• To pump blood

• To oxygenate blood

• To prevent backflow

• To store blood

What is the function of coronary arteries?

• Deliver nutrients to the heart

• Regulate heart temperature

• Deliver oxygen to the lungs

• Carry waste from the heart

What can an atrial septal defect lead to?

• Increased energy

• Heartbeat irregularities

• Improved lung function

• Enhanced blood flow

What might be needed to treat severe heart conditions?

• Exercise

• Sun exposure

• Medication or surgery

• Diet change