31. They have various functions such as storage of reserves, excretory materials, pigments, and minerals. 32. The excretory system is made of many tubes with many flame cells and excretory pores on them. 33. The excretory system is made of many tubes with many flame cells and excretory pores on them. 34. These beetles have an excretory organ that produces an odor telling the ants they mean no harm. 35. Although the body contains a haemocoel, there are no circulatory, respiratory, or excretory organs. 36. They may also be simply excretory organs ( hydathodes ), used for exuding surplus metabolic products. 37. The FCC generally describes indecency as programming that explicitly depicts or describes sexual or excretory organs or functions. 38. It's the first computer-generated gross-out movie based on the human excretory system. 39. Many arachnids have only one or the other type of excretory gland, although several do have both. 40. Like flatworms, they have no circulatory or respiratory systems, but they also lack an excretory system.
