How do Body Systems work together?

Circulatory System, pgs. 48, 49

1. What path does the blood take through the body?

It travels away from the heart in arteries, which lead to capillaries. From capillaries, it travels back to the heart in veins, then to the lungs, and then back to the heart, where it begins circulating again.

2. What do you think might happen in heart failure, when the heart does not pump effectively?

The cells of the body would receive less oxygen and fewer nutrients.

3. Why is the heart considered a double pump?

It receives blood from the lungs and pumps it to the rest of the body. At the same time, it receives blood from the rest of the body and sends it to the lungs.

4. How does the blood flow from the lungs through the body?

Blood flows from the lungs to the heart through veins. From the heart, it flows through arteries. From arteries, it flows through capillaries. From capillaries, it flows back to the heart through veins.

Respiratory System

pgs. 50, 51

5. What are the major organs of the respiratory system?

The major organs of the respiratory system are the lungs.

6. What are the tubes that branch from the trachea?

The tubes that branch from the trachea are the bronchi.

7. Where in the lungs does gas exchange occur?

Gas exchange (carbon dioxide for oxygen) occurs in the alveoli, or air sacs.

8. How does the circulatory system work with the respiratory system to provide each cell with the oxygen it needs?

Oxygen taken in by the lungs (respiratory system) is carried by red blood cells (circulatory system) to each of the body cells.

9. What structures carry oxygen-poor blood from the heart to the lungs?

The oxygen-poor blood is carried from the heart to the lungs through the pulmonary arteries.

10. What structures carry oxygen-rich blood from the lungs to the heart?

Oxygen-rich blood is carried from the lungs to the heart through the pulmonary veins.

11. How does oxygen get from the air into your blood?

You inhale oxygen when you breathe air; it travels down the trachea to the bronchi and then the alveoli. There, it passes into capillaries and is carried by red blood cells.