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A, Myelinic axons in fresh state, showing few nodes. B, Portion of a myelinic axon treated with boiling ether and alcohol to remove the myelin and leaving the neurokeratin network. a, axon.

Myelinic Axons

A, Myelinic axons in fresh state, showing few nodes. B, Portion of a myelinic axon treated with boiling…

Diagram showing the relation of the cerebrospinal to the sympathetic neurons. Labels: A, a medullated fiber, axon, or dendrite, coming from cerebrospinal system and dividing into numerous branches on reaching a sympathetic ganglion. These branches connect with those of the cells, b, B, in the ganglion, and these cells send their non-medullated fibers, axons, or dendrites, to supply the viscera, C, C, C, C.

Diagram of the Relation between Cerebrospinal and Sympathetic Neurons

Diagram showing the relation of the cerebrospinal to the sympathetic neurons. Labels: A, a medullated…

"Nerve tissue is really made up of a great number of distinctive units called <em>nerve cells</em>. Each cell usually contains a large nucleus and gives off one or more tiny branches, or processes. Thse cells vary more in shape and size than any other cell in the body. Each nerve cell has a number of short branches, and many have also one long branch which can be traced for some distance from the cell body." — Blaisedell, 1904

Nerve Cells

"Nerve tissue is really made up of a great number of distinctive units called nerve cells.…

Diagram of a neuron.

The Nervous System

Diagram of a neuron.

"A nerve cell from the brain." &mdash; Ritchie, 1918

Neuron

"A nerve cell from the brain." — Ritchie, 1918

Diagram of a neuron. Labels: A, axon arising from the cell-body and branching at its termination; D, dendrites; C and N, cell-body composed of C, cytoplasm, and N, nucleus.

Diagram of a Neuron

Diagram of a neuron. Labels: A, axon arising from the cell-body and branching at its termination; D,…

Scheme of the central motor neuron. The motor cell body, together with all its protoplasmic processes, its axis-cylinder process, collaterals, and end ramifications, represent parts of a single cell or neuron. Labels: a, h, Axone-hillock devoid of Nissl bodies, and showing fibrilation; c, cytoplasm showing Nissl bodies and lighter ground substance. n', nucleolus.

Scheme of the Central Motor Neuron

Scheme of the central motor neuron. The motor cell body, together with all its protoplasmic processes,…

The developmental stages exhibited by a pyramidal cell of the brain. Labels: a, neuroblast with rudimentary axon, but no dendrites; b and c, the dendrites beginning to sprout out; d and e, further development of the dendrites and appearance of collateral branches on the axon.

Pyramidal Cells of the Brain

The developmental stages exhibited by a pyramidal cell of the brain. Labels: a, neuroblast with rudimentary…