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Name: Period: Review: Circulation and Respiration Directions: Use the words below to complete the following description of the breathing process. You may use a word more than once. When you inhale, or breathe in, the allows the pulls down the abdomen and to fill with air. The air enters the body through the , where it is filtered. It may also enter through the The air travels through the throat to the the . , or windpipe. A small flap of skin called closes over the top of the windpipe to prevent food from entering. The air also passes through the which contains the vocal cords. In the chest, the windpipe divides into two branches, or . These branches enter the , where they split into many small tubes. The air can now enter all parts of the lung. The , or tiny air sacs, are located at the ends of the tubes. These air sacs transfer carbon dioxide from the blood to the air. The also transfer oxygen from the air to the blood, which is then sent back to the heart to be pumped throughout the body. When you exhale, or breathe out, the relaxes and pushes on the chest. This forces the air containing carbon dioxide out of the . Directions: Label the parts of the respiratory system. 1. ____________________________ 2. ____________________________ 3. ____________________________ 4. ____________________________ 5. ____________________________ 6. ____________________________ 7. ____________________________ 8. ____________________________ 9. ____________________________ Directions: Answer the following questions in complete sentences. 1. A red blood cell is moving through an artery in your leg. Describe the path that the blood cell will follow back to your heart. Identify the chamber of the heart to which it will return. 2. As the red blood cell travels through the capillaries, what happens to the oxygen carried by this red blood cell? 3. After the red blood cell returns to the heart, it travels to the lungs. a. Why must the red blood cell travel to the lungs? b. Is this pulmonary or systemic circulation? (Circle the correct answer.) 4. How do we get the ENERGY we need for life activities? (Refer to Figure 1 on page 431 to complete the sentences below.) In order for ENERGY to be released in the cells, the respiratory system provides and the digestive system provides from the digested food. The in the circulatory system carries these substances to each cell in the body. In the cells, the release ENERGY! combines with the to Name: Period: Review: Circulation and Respiration Directions: Use the words below to complete the following description of the breathing process. You may use a word more than once. When you inhale, or breathe in, the diaphragm pulls down the abdomen and allows the lungs to fill with air. The air enters the body through the nose, where it is filtered. It may also enter through the mouth. The air travels through the throat to the trachea, or windpipe. A small flap of skin called the epiglottis closes over the top of the windpipe to prevent food from entering. The air also passes through the larynx which contains the vocal cords. In the chest, the windpipe divides into two branches, or bronchi. These branches enter the lungs, where they split into many small tubes. The air can now enter all parts of the lung. The alveoli, or tiny air sacs, are located at the ends of the tubes. These air sacs transfer carbon dioxide from the blood to the air. The alveoli also transfer oxygen from the air to the blood, which is then sent back to the heart to be pumped throughout the body. When you exhale, or breathe out, the diaphragm relaxes and pushes on the chest. This forces the air containing carbon dioxide out of the lungs. Directions: Label the parts of the respiratory system. 1. 2. 3. 4. 5. 6. 7. 8. 9. Nose Alveoli Bronchi Trachea Broncioles Epiglottis Lung Diaphragm Larynx Directions: Answer the following questions in complete sentences. 1. A red blood cell is moving through an artery in your leg. Describe the path that the blood cell will follow back to your heart. Identify the chamber of the heart to which it will return. Artery to capillary to vein to inferior vena cava to the Right atrium of the heart 2. As the red blood cell travels through the capillaries, what happens to the oxygen carried by this red blood cell? The oxygen is dropped off along with nutrients and the blood picks up carbon dioxide and wastes. 3. After the red blood cell returns to the heart, it travels to the lungs. a. Why must the red blood cell travel to the lungs? To drop off the carbon dioxide and pick up oxygen b. Is this pulmonary or systemic circulation? (Circle the correct answer.) 4. How do we get the ENERGY we need for life activities? (Refer to Figure 1 on page 431 to complete the sentences below.) In order for ENERGY to be released in the cells, the respiratory system provides Oxygen and the digestive system provides nutrients from the digested food. The blood in the circulatory system carries these substances to each cell in the body. In the cells, the oxygen combines with the nutrients to release ENERGY!