Urethra
Urethra, duct that transmits urine from the bladder to the exterior of the body during urination. The…
Human skin
Human skin, in human anatomy, the covering, or integument, of the body’s surface that both…
Stroke
Stroke, also called apoplexy, sudden impairment of brain function resulting either from a substantial reduction…
Regeneration
Regeneration, in biology, the process by which some organisms replace or restore lost…
Higher-level pain pathways
Brain Many regions of the brain can influence the input arriving at…
Basal ganglia
Deep within the cerebral hemispheres, large gray masses of nerve cells, called…
Cerebral ventricles
Deep within the white matter of the cerebral hemispheres are cavities filled…
Spinal cord
Spinal cord, major nerve tract of vertebrates, extending from the base of the brain through the…
Tissue engineering
Spinal cord injury, any of various conditions caused by damage to the tract…




