glomerulus
The glomerulus
capillaries
The cup-shaped part of the nephron is called the renal (or Bowman's) capsule. It is located at the beginning of the nephron and surrounds the glomerulus, which is a network of capillaries. The renal capsule helps in the filtration of blood and the formation of urine.
If by knot you mean a complicated intertwining of capillaries surrounding the nephron, they are called the peritubular capillaries. They are largely responsible for the bodies ability to concentrate urine and maintain homeostasis.
Renal capillaries, aka the glomerulus, where nitrogenous wastes and excess water in the blood plasma diffuse over to the nephron to be filtered and excreted.
glomerulus
Glomerulus
peritubular capillaries
a ball , tightly coiled capillaries within a kidney nephron where renal filtration occurs
The glomerulous
Glomerulus
Most porous capillaries are present in glomerulous in a Bowmans capsule of nephron .They help in filtration of blood . Tortuous nature of capillaries also helps in filtration .