A specific class of antidepressants called tricyclic antidepressants have shown promise as a possible treatment for gliomas, but it wasnât until Hanahan and his team thought to combined then with the anticoagulant drug, ticlopidine, that the effects become clear.
The flow of blood in the capillaries is controlled by structures called precapillary sphincters. These structures are located between arterioles and capillaries and contain muscle fibers that allow them to contract. When the sphincters are open, blood flows freely to the capillary beds of body tissue. When the sphincters are closed, blood is not allowed to flow through the capillary beds. Fluid exchange between the capillaries and the body tissues takes place at the capillary bed. 02
1 The cardia (lower esophageal sphincter), or cardiac sphincter, at the upper portion of the stomach. 2  This sphincter prevents the acidic contents of the stomach from moving upward into the esophagus. 3  The pyloric sphincter, at the lower end of the stomach. The sphincter pupillae, or pupillary sphincter, belonging to the iris in the eye. 2  The orbicularis oculi muscle, a muscle around the eye. 3  The upper and lower oesophageal sphincters. 4  The cardia (lower esophageal sphincter), or cardiac sphincter, at the upper portion of the stomach.