Definitions for "Central canal"
lumen, cavity of neural tube within the spinal cord. Space is continuous with ventricular system of the brain.
the space in the middle of the grey matter of the spinal cord; it contains cerebrospinal fluid
Longitudinal canal in the center of an osteon that contains blood vessels and nerves; also called Haversian canal; a passageway along the longitudinal axis of the spinal cord that contains cerebrospinal fluid.
Keywords:  equisetum, diagrams, photos, stem
DIAGRAMS: PHOTOS: Equisetum Stem / Equisetum Stem