👉 Cystidium is a type of cell in the human body that contains two specialized structures called "cysts." These structures are similar to "bubbles" or "membranes," but they have a thin, clear membrane covering them. Cysts are found in various parts of the body, including the brain, kidneys, and lungs, where they help regulate fluid balance and maintain homeostasis. Cystidium is also known as a "cystic fibrosis cyst" or