The ____ of gases occurs between the ____ and blood in the capillaries that supply the ____. ____ cover 70% of the outside of alveoli, providing a large ____ area for ____ to diffuse across. The ____ surface area of the alveoli is around ____ square metres. The alveoli are ____ to provide a very ____ surface area for ____ exchange. Each of the alveoli is a ____ sphere about 300 μm in ____, giving it a larger surface area to ____ ratio than larger structures. This also means that you can fit a ____ number of them in each lung, there are around 350 ____ per lung Alveoli also create a ____ diffusion path - the walls of ____ capillaries and alveoli are just one ____ thick, this means gases ____ across them quickly. The ____ are also lined with a thin film of ____. Gases ____ in this water, making the diffusion ____ even smaller. The ____ of the lungs and the blood ____ through the surrounding ____ mean gases are being ____ continually. This creates steep ____ gradients so ____ and carbon ____ can diffuse as ____ as possible.

Gas Exchange Description

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?