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"The Brain is the encephalon, or center of the nervous system and the seat of consciousness and volition in man and the higher animals. Median Longitudinal Section through Head and Upper Part of Neck, to Show relation of Brain to Cranium and the Spinal Cord. <em>c,</em> cerebrum; <em>cb,</em> cerebellum; <em>sc,</em> spinal cord; <em>spc,</em> spinal column; <em>mo,</em> medulla oblongata passing, through foramen magnum, into the spinal cord; <em>pv,</em> pons Varolii; <em>cp,</em> cerebral peduncles or crura cerebri; <em>cqa,</em> anterior corpora quadrigemina; <em>cqp,</em> posterior corpora quadrigemina; <em>pg,</em> pineal gland; <em>pb,</em> pituitary body; <em>cc,</em> corpus collosum, divided transversely; <em>f,</em> fornix; <em>mg,</em> marginal gyrus; <em>gf,</em> gyrus fornicatus; <em>cmg,</em> calloso-marginal suleus; <em>O,</em> occipital lobe; <em>po,</em> parieto-occipital fissure; <em>cf,</em> calcarine fissure; <em>dm,</em>dura mater, separating cerebrum from cerebellum."&mdash;(Charles Leonard-Stuart, 1911)

Human Brain

"The Brain is the encephalon, or center of the nervous system and the seat of consciousness and volition…

The human spinal column

Spinal Column

The human spinal column

Side view of spinal column, without sacrum and coccyx. Labels: 1 to 7, cervical vertebrae; 8 to 19, dorsal vertebrae; 20 to 24, lumbar vertebrae; A, A, spinous processes; C, D, transverse processes; E, intervertebral aperture or foramen; a, atlas; 2, axis.

Human Spinal Column

Side view of spinal column, without sacrum and coccyx. Labels: 1 to 7, cervical vertebrae; 8 to 19,…

Transverse sections of spinal cord at different levels.

Transverse Sections of Spinal Cord

Transverse sections of spinal cord at different levels.

Side view of the vertebra. 1: Body; 2: Processes; 3: Opening for spinal cord.

Vertebra

Side view of the vertebra. 1: Body; 2: Processes; 3: Opening for spinal cord.

Top view of the vertebra. 1: Body; 2: Processes; 3: Opening for spinal cord.

Vertebra

Top view of the vertebra. 1: Body; 2: Processes; 3: Opening for spinal cord.

A diagram of a transverse section of a vertebrate. Labels: 1, the walls; 2, digestive organs; 3, circulatory organs; 4, ganglia; 5, spinal cord; 6, spinal column.

Transverse Section of a Vertebrate

A diagram of a transverse section of a vertebrate. Labels: 1, the walls; 2, digestive organs; 3, circulatory…