PSL280H1 Lecture Notes - Lecture 6: Heart Valve, Coronary Circulation, Cardiac Muscle
Document Summary
They can be long or thin and shrt/thick depending on the predators and prey. If you are going to get eaten, you are going to want to run which it long and thin bones. Cetaceans do have a little bit of an ability to flex their pectoral fins, but not as much as us. The shape of the fluke determines what their locomotory patterns are. Polar bears drag their hind limbs behind them when they are swimming. Otarrid seals use a style calle pectoral oscilation. Power/paddle/recovery compared with flexible sksleton, they can do tight turns, but they sacrifice instability in trajectory. The seals have 1 or 2 power strokes then glide, allowing the trajectory to move forward. Phocids use their pelvic flippers and they move them laterally, side to side. Walruses fall under the earless seal form of locomotion because they use their hind flippers for propulsion.