Weather data for Mecca in january: Weather data for Mecca for january are derived from an average of the weather forecast since 2009 in Mecca. There is a margin of error and these forecasts are to be considered as general information only. The weather in Mecca can vary slightly from year to year, but this data should limit surprises.
Freebase(0.00 / 0 votes)Rate this definition: Spinal cord. The spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the brain. The brain and spinal cord together make up the central nervous system.
The spinal cord is a long, fragile tubelike structure that begins at the end of the brain stem and continues down almost to the bottom of the spine (spinal column). The spinal cord consists of nerves that carry incoming and outgoing messages between the brain and the rest of the body. It is also the center for reflexes, such as the knee jerk reflex (see Figure: Reflex Arc: A No-Brainer). Like the brain, the spinal cord is covered by three layers of tissue (meninges). The spinal cord and meninges are contained in the spinal canal, which runs through the center of the spine. In most adults, the spine is composed of 26 individual back bones (vertebrae).