When the frog opens its mouth, Air flows in because it's in the nature of gases to flow from high pressure to low pressure ( Air to mouth ). When the air is inside the mouth of the frog, it closes its nose trills ( to avoid the escape if any air trapped ) and closes its mouth. When nose and mouth are closed, the air is trapped inside the mouth. Then, the frog raises its jaw which presses the air inside the mouth towards the lungs, because again, air under higher pressure (in mouth) goes to a place where there's lower pressure ( the lungs ). This is positive pressure inhalation.
Then O2 is released from the air to the lungs, and CO2 is picked up. The frog then lowers its jaw, to lower the pressure in the mouth, to let the air travel from the lungs, to the mouth and into the outside,
hope that helped!
I'm not completely sure, but try going on Discovery Channel on the internet. Then type in you question. It might come up :)
Good Luck!
frogs do breathe by positive pressure
toads do not have lungs,but they do breathe underwater. their skin absorbs the water which brings the oxygen into their bodies to help them breathe easily underwater. CORRECTION: Toads do in fact have lungs. Unlike many frogs, toads have dry skin but when in water they are still able to exchange gases through their skin in its moist state. Nevertheless, toads do have lungs, and draw air into their mouths and using their jaw muscles, force the air down into their lungs using positive pressure. It all depends on the species of toad, but both mechanisms for gas inhalation supplement each other.
External intercostal and diaphragm increase the volume of the lungs, this action dicreases the pressure of the lungs. (we know pressure moves from the region of higher region to lower, in this case pressure is high in atmosphere and low in lungs). So air gets drew up in our nose.
draw clouds
creates positive pressure that lets you draw the diluent easily. If you do not add air, a vacuum forms, making it difficult to draw the diluent.
We draw air into, and expel out of, the lungs.
As your static pressure increases your Amp draw will drop
To fill your lungs by sucking in air.
Meteorologists draw lines to indicate air pressure, which are called isobars.
Diaphragm! It is a dome-shaped muscle that helps to draw air into the lungs, which also separates the lungs from other important organs(heart,brain).
draw a flow chart to input ten number and count the positive negative and zero
Radii are always positive. No, it is not possible to draw a circle with negative radius.
The rib cage serves two functions. It primary function is protection for the heart and lungs. Without this protection fatal damage could too easily occur. The second and far lesser function is in being part of the system (with the intercostal muscles) to pull the chest up to increase negative pressure on the lungs and draw in breath.