science+page+43

Angela Corrao Science page 43 questions 1-3 1. The air first enters through your **nose**. Your nose is the primary passageway into and out of the respiratory system. From the nose the air flows into the **pharynx** or the throat. In addition to air, food and drink also travel through the pharynx on the way to the stomach. After traveling through the pharynx the air then goes to your **larynx** or voice box. The pharynx contains the vocal cords. The air then travels to your **trachea**. The trachea is the passageway for air traveling from the larynx to the lungs. After the trachea the air goes to **bronchi**. One bronchus goes to each lung and branches into thousands of tiny tubes called bronchioles. Lastly the air goes to your **lungs**. In the lungs, each bronchiole branches to form thousands of tiny sacs called alveoli. The difference between the two are that respiration involves breathing which is inhaling and exhaling, and cellular respiration involves chemical reactions that release energy from food. 3. **Cardiovascular system** transports materials to and from your cells, which consists of the organs the heart, the arteries, and the veins. The respiratory system is related to the cardiovascular system because in order for your cardiovascular system to work your respiratory system must be working because all the air has to travel through the lungs.
 * 2. Respiration ** is the entire process by which a body obtains and uses oxygen and gets rid of carbon dioxide and water.
 * Cellular respiration ** involves the chemical reactions and releases energy from food.
 * Respiratory system ** takes oxygen and expels carbon dioxide. The respiratory system consists of the following organs the lungs, the throat, and the passageways that lead to the lungs.