cGMP, or cyclic guanosine monophosphate, is a molecule that plays a crucial role in various biological processes. It acts as a secondary messenger in cells, helping to transmit signals from hormones and neurotransmitters. This signaling is important for regulating functions such as blood flow, vision, and nerve transmission. In the cardiovascular system, cGMP helps relax blood vessels, leading to lower blood pressure. It is also involved in the function of nitric oxide, which stimulates its production. Understanding cGMP is essential for developing treatments for conditions like heart disease and erectile dysfunction, where its signaling pathways are often disrupted.