Circulatory and Respiratory Systems - Gas Exchange

Circulatory and Respiratory Systems - Gas Exchange

Goal of the Respiratory and Circulatory Systems

• Bring O₂ to the body cells

• Take CO₂ away from the body cells

Why does the body need Oxygen?

Oxygen is used to make ATP, the cell's form of energy, in CELLULAR RESPIRATION

Multiple Choice

Why does the body need Oxygen?

• to stay hydrated

• to make glucose in photosynthesis

• to stay awake in class

• to make ATP energy in cellular respiration

Step 1) RESPIRATORY SYSTEM (O₂)

1. Oxygen is moved to the lungs by inhalation

2. Oxygen moves from the lungs to the bloodstream through the heart by diffusion

Step 2) CIRCULATORY SYSTEM (O₂)

3. Red blood cells carry Oxygen in the blood to body cells in different parts of the body

Multiple Choice

Which of the following is the correct order of O₂ movement?

• heart --> lungs --> mouth --> body cells

• mouth --> heart --> body cells --> lungs

• mouth --> lungs --> heart --> body cells

• lungs --> heart --> body cells --> mouth

Step 3) CELLULAR RESPIRATION

4. Oxygen moves from the bloodstream to the body cell by diffusion

5. Body cells use Oxygen to make ATP in the mitochondria

6. Carbon dioxide is made by the body cell as a waste product of cellular respiration

7. Carbon dioxide moves from the body cell to the bloodstream by diffusion

Step 4) CIRCULATORY SYSTEM (CO₂)

8. Carbon dioxide is carried in the bloodstream back to the heart

9. CO₂ passes from the heart to the lungs by diffusion

Step 4) RESPIRATORY SYSTEM (CO₂)

10. CO₂ leaves the lungs through the trachea to the mouth and nose in a process called exhalation

Multiple Choice

What is a waste product of cellular respiration?

• ATP

• O₂

• CO₂

• Glucose

Multiple Choice

Which two systems work together to bring O₂ into the body and CO₂ out of the body?

• circulatory and digestive

• respiratory and circulatory

• digestive and integumentary

• respiratory and integumentary

Multiple Choice

Where does Oxygen go after it enters the lungs?

• it moves to the mouth through exhalation

• it stays in the lungs

• it moves to the bloodstream through diffusion

• it moves to the body cells through diffusion

Multiple Choice

Without the respiratory system, body cells would not receive Oxygen from the air. How would an organism make energy in the cells?

• cells would make lungs to get O₂ to make ATP

• cells would not change, they can still get O₂ from the bloodstream

• cells would not make energy without O₂

• cells would do anaerobic respiration to make ATP without O₂

Multiple Choice

Where does Oxygen go after it enters the lungs?

• it moves to the mouth through exhalation

• it stays in the lungs

• it moves to the bloodstream through diffusion

• it moves to the body cells through diffusion