By Mayo Clinic Staff. Common warts are caused by an infection with the human papillomavirus (HPV). More than 100 types of HPV exist, but only a few cause warts on your hands. Other types of HPV are more likely to cause warts on your feet and other areas of your skin and mucous membranes. Most types of HPV cause relatively harmless conditions such as common warts, while others may cause serious disease such as cancer of the cervix.
The rate at which the glomerulus produces filtrate from plasma (the glomerular filtration rate) is much higher than in systemic capillaries because of the particular anatomical characteristics of the glomerulus.
This fluid is called the filtrate. It consists of water, glucose amino acids, some salts, and urea. The filtrate does not contain plasma proteins because they are too large to pass through the pores of the capillary membrane so they remain in the blood. Each kidney contains 1,000,000 nephrons that filter the blood and form urine. About 99% of the initial filtrate from the glomerulus is reabsorbed by the nephron and returned to the blood in the peritubular capillaries.