BIOB34H3 Lecture Notes - Lecture 5: Branchial Arch, Exhalation
Document Summary
Ventilation: cilia-driven flow: cilia-driven flow happens in bi-valved organisms (clams and mussels). The beating of the cilia on the surface of the gills moves water across the respiratory surface of the organism by causing flow to occur. Incurrent siphon water flows in and out through excurrent siphon. Cilia have two kinds to strokes: effective stroke and recovery stroke: the effective stroke pushes in one direction, maximizing contact and pushing water in one direction, the recovery stroke goes back in the limp way. It minimizes contact with the water so only really pushing in one direction. Ventilation: bulk flow: air/water always flows from areas of high pressure to areas of low pressure. Boyles law: the inverse relationship between pressure and volume p1v2 = p2v2. This only applies to gases as liquids are not compressible and can"t change volume by squeezing: pascal"s law: applying pressure to liquid will increase rate of flow.
