BIOL 235 Chapter 13: spinal cord and spinal nerves (A+ Graded)

dura mater correct answers the outer most layer of the meninges made of dense irregular connective tissue epidural space correct answers the space superficial to the dura mater arachnoid mater correct answers the middle meninx which is avascular. subdural space correct answers the space between the arachnoid mater and the dura mater which contains interstitial fluid. pia mater correct answers the innermost meninx made of a thin layer of transparent connective tissue that adheres to the surface of the spinal cord and brain. highly vascularized. subarachnoid space correct answers the space between the pia mater and the arachnoid mater which contains cerebrospinal fluid. cervical and lumbar enlargements correct answers bulges in the spinal cord in the neck and lower back regions which branch nerves to the upper and lower limbs. conus medullaris correct answers the spinal cord ends in this tapering conical structure filum terminale correct answers an extension of the pia mater beyond the spinal cord inferiorly which then blends with the arachnoid and dura mater to anchor the spinal cord to the coccyx. cauda equina correct answers literally "horses tail". wisps of nerves that branch off the spinal cord in the lumbar, sacral and coccygeal regions since the spinal cord is shorter than the vertebral column. posterior/dorsal root correct answers a bundle of axons at the posterior side of the spinal cord that contain only sensory axons. anterior/ventral root correct answers a bundle of axons at the anterior side of the spinal cord that contain only motor axons. posterior/dorsal root ganglion correct answers a bulge (cell bodies) in the sensory neurons as they reach the spinal cord anterior median fissure correct answers a wide groove at the anterior side of the spinal cord. posterior median sulcus correct answers a small groove at the posterior side of the spinal cord. gray commissure correct answers the crossbar of the H in the gray matter of the spinal cord.