Biology 2601A/B Lecture Notes - Circulatory System, Jellyfish, Heart
Document Summary
Most primpitive lack circulatory systems = not true. Hard to think of animals that don"t have some means of flow of water. Every 5 seconds will pump the volume of its body size through its system. Outgoing water shoots out the top and incoming water comes though entire body of the animal through little pores (utilizes for feeding and getting oxygen to entire body) Single flagellum of pilanocyte (sp?) drives the movement of water (polanocyte is the cells of the sponge) Someone injected dye into a sponge and above the sponge you can see a big plume of dye (the sponge release their sperm into the water this way) No. flase notion of progress that we are so much better than all these animals go from 2 chamber heart (1 atrium, 1 ventricle) 3 chambered heart (these chambers mxed oxygenated blood with deoxygenated system) It means convergent evolution (in the circulatory system between mammals and birds)!
