The macula densa is the thickening where the distal tubule touches the glomerulus. The afferent arterioles later diverge into the capillaries of the glomerulus. The juxtaglomerular apparatus is part of the kidney nephron, next to the glomerulus. Capillaries of the glomerulus are lined by endothelial cells. Acute glomerulonephritis, inflammation of the renal glomerulus, can follow streptococcal pharyngitis or skin infection. Primary IgA nephropathy is characterized by deposition of the IgA antibody in the glomerulus. The renal corpuscle is composed of two structures, the glomerulus and the Bowman's capsule. A specific target for the toxin appears to be the vascular endothelium of the glomerulus. Urinary causes occur anywhere between the kidney glomerulus and the urethral meatus. The Bowman's capsule contains a dense capillary network called the glomerulus. Proliferative glomerulonephritis is characterised by an increased number of cells in the glomerulus. The Bowman's capsule surrounds each glomerulus, and collects the filtrate that the glomerulus forms. It often occurs in the glomerulus, where it is called glomerulonephritis. Blood is filtered in the glomerulus by solute size. The kidney glomerulus filters the blood that arrives at the kidney.