Vertebral column and sacral curvatures) form during fetal development. The secondary curves develop after birth. The cervical curvature forms as a result of lifting the head and the lumbar curvature forms as a result of walking. The vertebral column surrounds the spinal cord which travels within the spinal canal, formed from a central hole within each vertebra. The spinal cord is part of the central nervous system that supplies nerves and receives information from the peripheral nervous system within the body. The spinal cord consists of grey and white matter and a central cavity, the central canal. Adjacent to each vertebra emerge
Tammy (given name) Tammy (given name) Tammy is a feminine given name. It can be a short form of the names Tamsin, Thomasina, or Tamar, Tamara or Tabitha. Tamsin and Thomasina are feminine versions of the name Thomas, a Greek form of the Aramaic name "Te'oma", meaning "twin." Tamara is a Russian form of the Hebrew name Tamar, which means "palm tree." In Israel "Tammy" (תמי) is commonly used as an abbreviation of the original Hebrew name. The name was popularized by a film series from the 1950s and 1960s about a lovable backwoods girl named Tammy Tyree. Tammy was most popular as