glomerulus
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.
The glomerulus
capillaries
glomerulus
The vascular part of the nephron in the kidney is called the renal corpuscle. It consists of the glomerulus, a network of capillaries, and Bowman's capsule, a structure that surrounds the glomerulus. This is where the process of blood filtration in the kidney begins.
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
peritubular capillaries
a ball , tightly coiled capillaries within a kidney nephron where renal filtration occurs
The glomerulous
Glomerulus
nephron consists of a cluster of blood capillaries called glomerulus and a renal tubule. now the renal tubule is swollen at one end and forms Bowman's capsule. the glomerulus surrounds this capsule and they together are called renal corpuscle. so the nephron consists of a renal corpuscle and a renal tubule. and the renal tubule is convoluted at first (also covered by blood capillaries) , then forms a U shape called "loop of henle" .then it ends into the collecting duct.