Renal corpuscle is a part of nephron. It consists of a blood vessel ball and its surrounding capsule (called "renal capsule"). Nephron is the basic unit that constitutes the structure and function of kidney, including renal corpuscles and renal tubules. Each kidney has about one million nephrons. Renal corpuscle consists of glomerulus and renal capsule. After entering the renal capsule, the afferent arterioles branch into a capillary network, which is wound into a ball in the renal capsule to form a vascular ball, and then flows into the glomerular arterioles and renal corpuscles. The renal capsule is a double-layer thin-walled cup capsule, the inner layer is close to the blood vessel ball, and there are holes in it, which is beneficial to the filtration of urine in plasma. The outer layer is continuous with the renal tubular epithelium, and the cavity between the inner and outer layers is called "renal capsule cavity", which communicates with the renal tubular cavity. When blood flows through renal corpuscles, some components in plasma are chromatographed and filtered out in the wall of blood vessel ball and capsule, forming protourine. Therefore, renal corpuscle is the physiological unit of urine filtration. I hope my answer can help you. I wish you the best of health! d2