Respiratory and Circulatory Systems Quiz

What is the main function of the respiratory system?

• Facilitate gas exchange

• Produce hormones

• Regulate body temperature

• Digest food

Which organ is responsible for gas exchange in the respiratory system?

• heart

• stomach

• liver

• lungs

What is the process called when oxygen enters the bloodstream and carbon dioxide leaves the bloodstream?

• photosynthesis

• respiration

• circulation

• digestion

What is the main function of the circulatory system?

• Transporting oxygen, nutrients, and waste products

• Filtering blood

• Producing hormones

• Regulating body temperature

Which organ pumps blood throughout the body in the circulatory system?

• heart

• stomach

• brain

• lungs

What gas is inhaled in the body through the nose and mouth?

• Oxygen

• Carbon

• Carbon Dioxide

• Nitrogen

What protects the lungs?

• skull

• pelvis

• ribs

• femur

What is the largest artery in the human body?

• vein

• capillary

• aorta

• pulmonary artery

What is the smallest blood vessel in the circulatory system?

• artery

• vein

• heart

• capillary

What is the liquid part of the blood?

• plasma

• water

• blood cell

• platelet