In temporal perspective, sorrowful crying is due to looking to the past with regret or to the future with dread. The lacrimal system is made up of a secretory system, which produces tears, and an excretory system, which drains the tears. The tears that are drained through the punctum will eventually be drained through the nose. Wikimedia Commons has media related to Crying. This includes shutting down unnecessary body functions, such as digestion, and increasing blood flow and oxygen to necessary muscles. Recent psychological theories of crying emphasize the relationship of crying to the experience of perceived helplessness.