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.
Fenestrated capillaries have intracellular perforations called fenestrae are found in endocrine glands, intestinal villi and kidney glomeruli and are more permeable than continuous capillaries. Discontinuous capillaries have open spaces between endothelial cells are very permeable and sometime permit the passage of blood cells between them.These are found in the liver, spleen and bone marrow. Blood vessel endothelial cells have membrane-bound vesicular structures in their cytoplasm.