term 3 f3/ t1 f4 gaseous exchange

Question	Answer
define a gaseous exchange surface	a surface adapted for the diffusion of carbon dioxide and oxygen
describe some properties that a g.e.s must have if it depends on slow passive diffusion for movement	1. it should be thin ensuring a short distance for travel of the gases 2. it should have a large surface area to maximize absorption 3. it should be moist as gases diffuse faster when dissolved in a liquid 4. close to a rapid transport system to move gases to cells quickly and maintain a steep concentration gradient at the surface
describe the gaseous exchange surface of 1. plants 2. amoeba 3. worms	1. stomatal pores on the under surface of leaves that allow air to flow into the air spaces of the mesophyll layer 2. the cell surface membrane where gas diffuse across 3. moist skin as the worm lives in the soil. surface cells also secrete mucus for easier diffusion
describe the gaseous exchange surface of 4. insects 5. fish 6. mammals	4. tracheal system starting with outer pores into air channels and chambers throughout the insects body 5. gill lamellae that is inflated by oxygenated water 6. alveoli air sacs that are filled with oxygen rich air at inhalation
draw and label the G.E.S of a human	Image: 8826f1da-c7f5-4d13-9a78-8e35170d37e5 (image/jpg)
draw and label the G.E.S of a fish	Image: b9a9682a-cc10-4257-bf21-537c7a38acd4 (image/png)

Resource summary

	Created by allisten cooper over 8 years ago