The process of ultrafiltration is performed by
Glomerulus
The process of ultrafiltration is carried out by glomerulus. Whereas Bowman's capsule receives glomerular filtrate. Proximal convoluted tubule reabsorbs most of water, glucose and sodium ions, Loop of Henle is the U shaped structure of the tubule that conducts urine within each nephron and helps in some absorption of water and sodium ions.