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A back view of the brain and spinal cord. Labels: 1, The cerebrum. 2, The cerebellum. 3, The spinal cord. 4, Nerves of the face. 5, The brachial plexus of nerves. 6, 7, 8, 9, Nerves of the arm. 10, Nerves that pass under the ribs. 11, The lumbar plexus of nerves. 12, The sacral plexus of nerves. 13, 14, 15, 16, Nerves of the lower limbs.

A Back View of the Brain and Spinal Cord

A back view of the brain and spinal cord. Labels: 1, The cerebrum. 2, The cerebellum. 3, The spinal…

The brain and spine.

Brain and Spine

The brain and spine.

In the Mollusca are found the ganglions and connective arrangement, with both sensitive and motor nerves, and on a plan corresponding to the body. Labels: 1, Esophagal ganglions. 2, Cerebral ganglions. , Pedal of locomotive ganglions. 4, Respiratory ganglions.

Diagram of a Type of Mollusca

In the Mollusca are found the ganglions and connective arrangement, with both sensitive and motor nerves,…

Nerve-filaments, decussing with their sheath.

Nerve Filaments

Nerve-filaments, decussing with their sheath.

Diagram illustrating the general arrangement of the nervous system.

Diagram of the Nervous System

Diagram illustrating the general arrangement of the nervous system.

View of the nervous system of man, showing the nerve centers (brain and spinal cord) giving off nerves to supply the whole of the body.

The Nervous System

View of the nervous system of man, showing the nerve centers (brain and spinal cord) giving off nerves…

Diagram of the human nervous system showing the brain, spinal cord, and nerves.

Nervous System

Diagram of the human nervous system showing the brain, spinal cord, and nerves.

A representation of the brain, spinal cord and spinal nerve. Labels: 1, The cerebrum. 2. The cerebellum. 3, Spinal cord. 4, The sciatic nerve. A. Distribution of the olfactory nerve. Labels: 1, 2, Nerve of smell. B. Optic Nerve. Labels: 15, Nerve of vision. C. The gustatory nerve. Labels: 1, 2, 3, 4, Branches of the nerve of taste. D. Auditory nerve. Labels: 13, Nerve of hearing.

Nervous System

A representation of the brain, spinal cord and spinal nerve. Labels: 1, The cerebrum. 2. The cerebellum.…

The human nervous system includes the brain, spinal cord, and the nerves. Labels: A, cerebrum; B, cerebellum.

Nervous System

The human nervous system includes the brain, spinal cord, and the nerves. Labels: A, cerebrum; B, cerebellum.

The nervous system of insects is composed primarily of a double series of ganglions united by longitudinal cords. Shown is a diagram of the nervous system of a beetle. Labels: 1, Central ganglia. 2, Nerves that connect the ganglions.

Diagram of Nervous System of a Beetle

The nervous system of insects is composed primarily of a double series of ganglions united by longitudinal…

In the nervous system of the centipede the ganglions are arranged in pairs of nearly equal size, except the ganglion that answers to the brain, which is larger, along the surface of the alimentary canal.

Diagram of the Nervous System of a Centipede

In the nervous system of the centipede the ganglions are arranged in pairs of nearly equal size, except…

Nervous system of an adult ladybug. Ag, optic ganglion.

Nervous System of a Ladybug

Nervous system of an adult ladybug. Ag, optic ganglion.

Nervous system of the larva of a ladybug. Labels: Gfr, frontal ganglion; G, cerebral ganglia; Sg, subcesophageal ganglion; G'-G", ganglia of the ventral chain.

Nervous System of a Ladybug Larva

Nervous system of the larva of a ladybug. Labels: Gfr, frontal ganglion; G, cerebral ganglia; Sg, subcesophageal…

Nervous system of a flatworm. Labels: G, cerebral ganglia and eyes; St, the two lateral nerve trunks; D, intestine with mouth.

Nervous System of the Flatworm

Nervous system of a flatworm. Labels: G, cerebral ganglia and eyes; St, the two lateral nerve trunks;…

Diagram of the nervous system of a starfish. N, nerve ring.

Nervous System of the Starfish

Diagram of the nervous system of a starfish. N, nerve ring.

In the Radiata, the starfish manifests one of the simplest forms of nervous systems. it consists of a central mass, with five arms radiating from it. In the center is the mouth, and beneath it the stomach or gastric cavity, which sends branches to each limb. The nervous system consists of five similar ganglions situated in the central portion at the base of the arms. These ganglions are connected and each sends off nerve-filaments to corresponding limbs.

Diagram of a Radiata

In the Radiata, the starfish manifests one of the simplest forms of nervous systems. it consists of…

A section of the brain and spinal column. Labels: 1, The cerebrum (large brain). 2, The cerebellum (small brain). 3, The Medulla Oblongata. 4, The spinal cord in its canal.

The Spinal Column and Brain

A section of the brain and spinal column. Labels: 1, The cerebrum (large brain). 2, The cerebellum (small…

The sympathetic ganglions and their connection with other nerves. Labels: A, The semilunar ganglion and solar plexus. D, The thoracic (chest) ganglions. E, The external and internal branched of the thoracic ganglions. G, H, The right and left coronary (heart) plexus. I, N, Q , The inferior, middle and superior cervical (neck) ganglions. 1, The renal plexus of nerves. 2, The lumbar (loin) ganglions. 3, Their internal branches. 4, Their external branches. 5, The aortic plexus of nerves.

The Sympathetic Ganglions and their Connection to other Nerves

The sympathetic ganglions and their connection with other nerves. Labels: A, The semilunar ganglion…