Urination

**Urine secretion** is a natural process that occurs in the human body, consisting of three stages: 1. Capillary glomerular filtration (10 seconds) - plasma and proteins are filtered from the blood plasma, while individual blood cells pass through the vascular capillaries of the glomerulus. 2. Filtration erection (30-40 seconds) - secondary urine is formed, which enters the urine collection tube, where macrophages are concentrated, which absorb nephrocytes (renal filter cells) and other formed elements.