PART A Objective: • Materials: Identify the key parts of the breathing system What a Bunch of Grapes! Bunch of grapes or any other bunch of fruits or vegetables such as Ar-arosep or lato (seaweed), lanzones, cauliflower, etc. Procedure: 1. Hold up the bunch of grapes. Let the bunch of grapes represent the breathing system. 2. Within your group, locate the parts of the breathing system: the main stem as the trachea, the large branching stems as the bronchi, and all the little stems as the bronchioles. The individual grapes are the airsacs or alveoli. 3. One by one, gently take out some of the grapes to expose more of the branching stems (bronchioles). Observe its structure. 4. Trace the pathway of oxygen using the "Bunch of Grapes" model. Note that air moves from the nose (nasal cavity) and mouth (oral cavity) to the trachea, bronchi, bronchioles, and then into the alveoli (air sacs). The air we breathe carries the gas oxygen. When we breathe, the oxygen goes to the lungs. BRONCHI ALVEOLI TRACHEA BRONCHIOLES Objective: ● Describe the function of each part of the breathing system Procedure: 1. Refer to the diagram, and check your understanding of the breathing system by labeling each part and giving its functions in the box corresponding to the part. 0000 Figure 2. The human respiratory system Guide Questions: Q 1. What does each part of the "Bunch of Grapes" model represent, in relation to the breathing system? Q 2. How will you describe the pathway of oxygen in the breathing system? Q 3. What will happen if one part of the system fails to carry out its function properly? KEY CONCEPTS The air we breathe goes through the nose, nasal passages, and then through the trachea or windpipe, which separates into two branches, called bronchial tubes or bronchi, one entering each lung. The bronchi subdivide many times inside the lungs, analogous to the branching pattern of grapes, finally becoming hairlike tubes called bronchioles. In the last part of the terminal bronchioles are tiny bubble-like bunch of structures called alveoli or airsacs.
Answers & Comments
The Human Respiratory System is a biological system made up of organs inside the body whose main responsibility is to help us breathe. The goal of this system is to take up oxygen by breathing in and exchanging it for carbon dioxide to be exhaled.
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Guide Questions Answers
Q1. The grape is a metaphorical visual representation of the human respiratory system. The main largest branch is meant to be the trachea, the branches attached to the main branch are the bronchi, the smallest section of the branch that is attached to the grape itself is the bronchioles, and, lastly, the grapes themselves are the alveoli.
Q2.The oxygen first enters the nose and/or the mouth, then it is carried to the trachea, then the bronchi, and finally the bronchioles. The final destination of the oxygen is in the alveoli where it is exchanged to be carbon dioxide.
Q3. All parts of the respiratory system are essential for it to function. If, even, one organ of the system malfunctions it could have fatal consequences.
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