Your Body's Delivery System

What are the two important systems that keep the body alive and energized?

• Circulatory and respiratory systems

• Digestive and nervous systems

• Muscular and skeletal systems

• Endocrine and lymphatic systems

How does oxygen enter the bloodstream from the lungs?

• Through the walls of the alveoli into capillaries

• Directly through the trachea

• By dissolving in the blood plasma

• Through the bronchial tubes

What role does hemoglobin play in the circulatory system?

• It attaches to oxygen in red blood cells

• It breaks down carbon dioxide

• It transports nutrients

• It fights infections

What happens to carbon dioxide in the alveoli?

• It is exhaled out of the body

• It is converted into oxygen

• It is absorbed into the bloodstream

• It is stored in the lungs

How does the heart contribute to the circulatory process?

• It pumps blood in a specific direction

• It filters oxygen from the blood

• It stores oxygen-rich blood

• It produces red blood cells

What is the function of the capillaries in the respiratory system?

• They facilitate gas exchange between alveoli and blood

• They transport blood to the heart

• They store oxygen

• They produce carbon dioxide

Why is the cycle of oxygen delivery and waste removal important for cells?

• It keeps cells alive and functioning

• It helps in digestion

• It regulates body temperature

• It supports muscle movement