BIO202H5 Lecture Notes - Lecture 3: Branchial Arch, Carbonic Anhydrase, Globin
Document Summary
Think of gills as a major component. Each side of gill arch there are butterfly wing looking things. When water flows through them the filaments extend and accept the water flowing across them. In the diagram the green arrow is blood flow of poor in oxygen. The red arrow is blood flow of rich in oxygen. Water flowing through the mouth and gill structures, the water is coming through the arc and going across in the opposite direction of blood flow. The key to increasing efficiency is the opposite flow of blood and water. We increase efficiency because we are optimizing concentration gradient (p1-p2) fick"s law. One single volume of air flowing in a uni directional sense in birds. The red in the diagram demonstrates the single volume of air and we see there are two respiration cycles involved: the first one we push air through posterior sacs into the lungs.
