WebWish toward create or adapt OER like this? How how BCcampus backing open education and how you can access Pressbooks. WebGas exchange by direct diffusion across surface membranes is efficient for organisms less than 1 mm in diameter. In simple organisms, such as cnidarians and flatworms, every cell in the body is close to the external environment. Their cells are kept moist and gases diffuse quickly via direct diffusion.

2.1 – Introduction to Respiratory Systems

Websponges, cnidarians, flatworms use direct diffusion to exchange gases while air is about 21% oxygen by volume, water holds much less, creating environmental pressures on aquatic organisms that are not present in terrestrial ecosystems Marine nudibranch, which exchanges gas through its skin WebThe body of a flatworm is adapted for efficient gas exchange between the water and the cells inside the body. Using the diagram, explain how two features of the flatworm's … fischer foundation bolt

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WebWanted to create otherwise adapt OER like on? Learn how BCcampus sustains open educate and select you can access Pressbooks. WebThe alveoli wall is 1 cell this so there is a short diffusion distance between the air and blood, this allows rapid exchange of CO2 and O2 gases. A steep concentration gradient also helps diffusion from a high to a low concentration, … WebWish to create or adapt OER like this? Learn how BCcampus supports open education and how you can access Pressbooks. camping sites in lake district cumbria