GradeGen

The movement of air into and out of the lungs, which refreshes the air at the gas-exchange surfaces.

The movement of air or water over a gas exchange surface, helping maintain concentration gradients.

Ventilation moves the surrounding fluid; diffusion moves gases across the exchange barrier.

The movement of air into and out of the lungs.

At an animal gas-exchange surface, ventilation refreshes the air or water, while blood flow refreshes the blood.

Link each adaptation to its effect: a thin barrier shortens the diffusion path; blood flow and ventilation maintain concentration gradients.

Link each adaptation to its effect: walls one cell thick shorten the diffusion distance; ventilation and blood flow maintain concentration gradients.

Distinguish ventilation, which moves air, from gas exchange, which occurs by diffusion.

The movement of air into and out of the lungs, which refreshes the air at the gas-exchange surfaces.

The movement of air or water over a gas exchange surface, helping maintain concentration gradients.

Ventilation moves the surrounding fluid; diffusion moves gases across the exchange barrier.

The movement of air into and out of the lungs.

At an animal gas-exchange surface, ventilation refreshes the air or water, while blood flow refreshes the blood.

Link each adaptation to its effect: a thin barrier shortens the diffusion path; blood flow and ventilation maintain concentration gradients.

Link each adaptation to its effect: walls one cell thick shorten the diffusion distance; ventilation and blood flow maintain concentration gradients.

Distinguish ventilation, which moves air, from gas exchange, which occurs by diffusion.

Ventilation