BIOSC 1250 Lecture Notes - Lecture 15: Cellular Respiration, The Fluid, Trachea
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Thus, the most obvious function of the respiratory system is to provide the cells in the body with oxygen (o2) and rid the body of co2. In order to do this, a moist and thin exchange surface that lets the gases exchange between the blood and the external environment is needed. In mammals (and most other land-dwelling animals) this problem is solved by placing the exchange surface inside of our body. This helps to keep the surface warm and moist. However, this creates another problem: getting external air to this membrane (as well as finding a way to incorporate such a large surface area into the body). Movement of air to (to provide o2) and from (to eliminate co2) this exchange surface requires some type of pumping mechanism; the so-called respiratory muscles accomplish this function. The key functions of the respiratory system: (slide 3) Exchange of gases between the atmosphere and the blood.
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Related Questions
1. What is the surface area to volume ratio of an approximately spherical shaped organism with a body radius of 3 m? (please submit your answer to the nearest two decimal places and without units)
2. Assuming a spherical body shape, what is the surface area of an organism with a radius of 3 m? (please answer to the nearest 2 decimal places and do not provide units)
3. What is the driving force for respiration?
A. A large, moist surface area
B. Concentration gradient for gases that are exchanged between the respiratory medium and the respiratory surface |
C. A respiratory pigment |
D. Countercurrent movement of two fluids in opposite directions