Asterix (character) Asterix (French: AstÃ©rix) is a fictional character the titular hero of the French comic book series The Adventures of Asterix. The series portrays him as a diminutive but fearless Gaulish warrior living in the time of Julius Caesar's Gallic Wars.
Basically, a nephron comprises a renal tubule and blood vessels. The renal tubule expands into a cup-shaped structure called the Bowman's Capsule, which contains a ball of capillaries known as the Glomerulus. The Glomerulus is the primary structure of the filtering process.
Once in the pelvis of the kidney the filtrate (now urine) contains substances that were pressure filtered and never reabsorbed such as urea, excess salt, water and other substances that were secreted from the blood such as hydrogen ions, drugs, or creatinine..REABSORPTION: Reabsorption, by definition, is the movement of substances out of the renal tubules back into the blood capillaries located around the tubules (called the peritubular copillaries). Substances reabsorbed are water, glucose and other nutrients, and sodium (Na+) and other ions.