Circulatory and Respiratory Systems

Which system moves blood to deliver oxygen and nutrients and remove waste?

• Respiratory system

• Circulatory system

• Digestive system

What does the heart do?

• Pumps blood

• Holds air

• Digests food

Arteries carry blood _______.

• to the heart

• away from the heart

• only in the lungs

Veins carry blood _______.

• back to the heart

• away from the heart

• to the stomach

Match each respiratory part to its job.

• Air enters and dust is filtered out

• Diaphragm

• Muscle that helps lungs breathe (moves down to inhale, up to exhale)

• Trachea

• Tube that carries air from throat to lungs

• Nose/Mouth

Where does gas exchange happen in the lungs?

• Alveoli

• Bronchioles

• Trachea

Which system brings oxygen into the body and removes carbon dioxide?

• Circulatory system

• Respiratory system

• Skeletal system

What do the bronchi and bronchioles do?

• Carry air through the lungs

• Pump blood

• Filter food

What is the main job of the digestive system?

• To break down food into nutrients and remove solid waste

• To pump blood around the body

• To help you breathe air

• To send messages through nerves

Which shows the correct path of digestion?

• Mouth → Stomach → Esophagus → Small Intestine → Large Intestine

• Mouth → Esophagus → Stomach → Small Intestine → Large Intestine

• Mouth → Small Intestine → Stomach → Esophagus → Large Intestine

• Esophagus → Mouth → Stomach → Large Intestine → Small Intestine