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Parasympathetic Division
...  in preganglionic neurons to form a connection between spinal and cranial nerves, all the way to the terminal ganglia. The preganglions are cell bodies located in the oculomotor nerve, brainstem, vagus nerve, facial nerve, glossopharyngeal nerve, and in the spinal cord. The terminal ganglia are found in the walls of the target organs at the pelvis, thorax and abdomen or in the head.  ...

Accessory Nerve
...  the accessory nerve? The accessory nerve has a cranial part and a spinal part. The cranial part serves the same function as the vagal nerve fibers; thus, we often consider it as a component of the vagus nerve instead of the accessory nerve. The spinal accessory nerve from the central nervous system provides motor innervation for two muscles of the neck. These two muscles are the trapezius  ...

Medulla Oblongata
...  and hypoglossal nerves forth. The vestibular nuclei forms the vestibulocochear nerves, and on the medulla oblongata’s individual lateral section lies the vagus nuclei which creates the vagus  ...

Veins To The Head And Neck
...  placed near the cranial venous sinuses. These venous sinuses facilitate the reception of the blood coming from the opthalmic, cerebellar and meningeal veins. The internal jugular veins run down the vagus nerve and the common carotid artery, situated near the inferior regions of the neck. The carotid sheath protects all the veins located beneath the sternocleidomastoid muscles . The  ...

Large Intestine
...  by the superior and inferior mesenteric plexus. The celiac plexus also does a little innervation. Parasympahetic innervation of the large intestines are done by pelvic splanchnic nerves and the vagus nerves. A person knows that defecation is needed when bowel pressures trigger the sensory fibers that send the message that the colon is full. Blood supply to the large intestine is done by the  ...

Parathyroid Glands
...  the gland. Blood supply and venous drainage to the parathyroid glands are basically that of the thyroid glands. However, the innervation of the parathyroid glands differ from that of the thyroids. vagus nerves branch into pharyngeal branches to deliver the neurons to the parathyroids. The cervical sympathetic ganglia also drive neurons to the parathyroid glands. The parathyroid glands only  ...


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