Circulatory and Respiratory Systems Quiz

What is the primary function of the heart in the circulatory system?

• To produce red blood cells

• To filter toxins from the blood

• To pump blood throughout the body

• To absorb nutrients from food

What is the main role of red blood cells in the body?

• To fight infections

• To carry oxygen to the body's tissues

• To clot blood

• To remove carbon dioxide from the body

Where does gas exchange primarily occur in the respiratory system?

• Trachea

• Bronchi

• Alveoli

• Larynx

Which of the following best describes the pathway of blood circulation in the body?

• Heart → Lungs → Body → Heart

• Heart → Body → Lungs → Heart

• Lungs → Heart → Body → Lungs

• Body → Heart → Lungs → Body

Which organ is NOT part of the respiratory system?

• Lungs

• Trachea

• Heart

• Bronchi

Why is oxygen important for the body?

• It helps to digest food

• It is used to produce energy in cells

• It cools the body down

• It helps to produce red blood cells

What is the name of the two upper chambers of the heart?

• Ventricles

• Atria

• Valves

• Septum

What is the correct sequence of air flow during inhalation?

• Nose/Mouth → Trachea → Bronchi → Alveoli

• Nose/Mouth → Alveoli → Bronchi → Trachea

• Trachea → Nose/Mouth → Bronchi → Alveoli

• Alveoli → Bronchi → Trachea → Nose/Mouth

What is the main function of the valves in the heart?

• To pump blood

• To produce red blood cells

• To prevent backflow of blood

• To filter blood

Which part of the blood carries carbon dioxide away from the cells?

• Red blood cells

• White blood cells

• Platelets

• Plasma