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Top view of the human brain.

Human Brain

Top view of the human brain.

A top view of a dissection of the human brain showing the lateral fourth and fifth ventricles.

Human Brain

A top view of a dissection of the human brain showing the lateral fourth and fifth ventricles.

A view of the Corpus Callosum from above.

Human Brain

A view of the Corpus Callosum from above.

Side diagram of the human brain showing which parts of the brain control hearing, speech, vision, legs, head, arm, and face.

Human Brain

Side diagram of the human brain showing which parts of the brain control hearing, speech, vision, legs,…

Side diagram of the human brain showing which areas perform the sense of taste, smell, and vision.

Human Brain

Side diagram of the human brain showing which areas perform the sense of taste, smell, and vision.

Section of gray matter of anterior cornu of a calf's spinal cord; a, nerve fibers of white matter in transverse section, showing axis cylinder in the center of each; r, large stellate nerve cells with nuclei and three prolongations.

Gray Matter of Spinal Cord

Section of gray matter of anterior cornu of a calf's spinal cord; a, nerve fibers of white matter in…

"Diagrammatic section of spinal cord. p.f., Posterior fissure; p.c., posterior column of white matter; d.p.s., dorsal, posterior, sensory or afferent root; g., ganglion; v.a.m., ventral, anterior, motor or efferent root; c.n., compound spinal nerve with branches; s.g., sympathetic ganglion; a.c., anterior column--the anterior fissure is exaggerated; g.c., ganglion cells; g.m., grey matter; w.m., white matter." -Thomson, 1916

Vertebrate Spinal Cord

"Diagrammatic section of spinal cord. p.f., Posterior fissure; p.c., posterior column of white matter;…