What structure surrounds the glomerulus in the nephron?

The structure that surrounds the glomerulus in the nephron is Bowman's capsule. This double-walled epithelial structure encases the glomerulus, which is a network of capillaries involved in the filtration of blood. Bowman's capsule plays a crucial role in the initial stages of urine formation.

When blood flows through the glomerulus, the high pressure in these capillaries promotes the filtration of water, ions, and small molecules from the blood into the space between the inner and outer layers of Bowman's capsule, forming what is known as glomerular filtrate. This process is the first step in the urine formation process, allowing essential nutrients and waste products to be separated.

In contrast, the proximal convoluted tubule, distal convoluted tubule, and Loop of Henle are parts of the nephron that follow the glomerulus and Bowman's capsule in the sequence of urine formation and are involved in reabsorption and secretion processes, but they do not surround the glomerulus itself.