Spinal cord and nerve roots are supplied by ?

Ans. is D i.e., All of the aboveAnterior and posterior spinal aeries supply spinal cord, but not spinal nerve roots.Spinal nerve roots are supplied by radicular aeries which are segmental branches of veebral, ascending cervical, deep cervical, intercostal and sacral aeries.Blood supply of spinal cord1. The spinal cord receives its blood supply from :The anterior spinal aeryTwo posterior spinal aeriesIn addition to these channels the pia mater covering the spinal cord has an aerial plexus (called the aerial vasocorona) which also sends branches into the substance of the cord.2. The main source of blood to the spinal cord is from the veebral aeries (form which the anterior and posterior spinal aeries take origin)However, the blood from the veebral aery reaches only up the cervical segments of the cord.Lower down the spinal cord receive blood through radicular aeries that .These arise form spinal branches of the veebral, ascending cervical, deep cervical, intecostal, lumbar and sacral aeries