Blood and Circulation

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Respiratory System
Mechanics
E X E R C I S E
NAME: Ailyn Sedaria-Lapuz
LAB TIME/DATE: March 3, 2013

1. Define each of the following terms:
• respiration :means exchange of gases ( oxygen and carbon dioxide) between a living organism and its environment; Breathing. • ventilation: movement of air in and out of the lungs
• alveoli: small air sacs or cavities in the lung that give the tissue a honey comb appearance and expand its surface area for the exchange of oxygen. • diaphragm: a dome-shaped muscle that divides the thoracic and abdominal cavities—contracts, making the thoracic cavity larger.

• inspiration : Reduces the pressure within the thoracic cavity, allowing atmospheric gas to enter the lungs.

• expiration: When the diaphragm relaxes, the pressure within the thoracic cavity increases, forcing air out of the lungs

2. Explain how the respiratory and circulatory systems work together to distribute oxygen to, and remove carbon dioxide from the cells of the body.

The circulatory system and the respiratory system work closely together to ensure that organ tissues receive enough oxygen. Oxygen is required for cellular functions. The air breathed in and held in the lungs is transferred to the blood. The blood is circulated by the heart, which pumps the oxygenated blood from the lungs to the body. Additionally, the two body systems work together to remove carbon dioxide, which is a metabolic waste product.

3. Match each of the definitions in Column A with the appropriate term in Column B. Column A
I__the percentage of vital capacity exhaled during a 1-second period of the FVC test D__the amount of air that can be taken into the lungs beyond the tidal volume E__the amount of air that can be expelled from the lungs beyond the tidal volume A__the volume of a normal breath

C__the maximum amount of air that can be voluntarily moved in and out of the lungs B__the proportion of pressure that a single gas exerts within a...
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