posterior root the posterior, or sensory, division of each spinal nerve, attached centrally to the spinal cord and joining peripherally with the anterior root to form the nerve before it emerges from the intervertebral foramen; each posterior root bears a spinal ganglion that conveys sensory fibers to the spinal cord.he sensory division of each spinal nerve, attached centrally to the spinal cord and joining peripherally with the ventral root to form the nerve before it emerges from the intervertebral foramen.
Most published information about the life span of saltwater fish are from public aquariums where the fish are kept in the best possible conditions. Many saltwater fish succumb to illness early in life due to poor husbandry. Some saltwater species only live an average of 2 to 4 years.
Information on the biology and life cycle of cuttlefish - can anyone help? Anybody knows about the life span of Cuttlefish. How long does it live and when it reproduces and how many times a year they reproduce? In my research area in the Red Sea there are two fishing seasons. The first extend from January to May and the Second from July to September.