In myths, rosemary has a reputation for improving memory and has been used as a symbol for remembrance during war commemorations and funerals in Europe and Australia.Mourners would throw it into graves as a symbol of remembrance for the dead.n myths, rosemary has a reputation for improving memory and has been used as a symbol for remembrance during war commemorations and funerals in Europe and Australia.
Up close: Gills. The clam gills play an interesting role in the clam's survival. The gills have two functions in two separate systems of the clam. For the digestive system, the gills aide in digestion through separating silt from the nutrition and aids in the respiratory system through providing oxygen to the clam.
Structure. The gas exchange organs in fish are the gills, which are near the mouth and are also near the the surface of the skin. They are covered by the operculum which is a flap of skin that protects the gills.. Fish must cope with the buoyancy of the water they live in. They have swim bladders which helps the fish to conserve energy for efficient gas exchange and help them travel at different altitudes in the water. Since humans live on land, there is hardly any buoyant force, so humans do not have swim bladders. 2.