-The spinal cord is connected to a section of the brain called the brainstem and runs through the spinal canal.
-Cranial nerves exit the brainstem.
Nerve roots exit the spinal cord to both sides of the body.
-The spinal cord carries signals (messages) back and forth between the brain and the peripheral nerves.
-Cerebrospinal fluid surrounds the brain and the spinal cord and also circulates within the cavities (called ventricles) of the central nervous system.
-The leptomeninges surround the brain and the spinal cord.
-The cerebrospinal fluid circulates between 2 meningeal layers called the
pia matter and the arachnoid(or pia-arachnoid membranes).
PERIPHERAL NERVOUS SYSTEM
Structure of a Nerve
---A nerve contains bundles of nerve fibers, either axons or dendrites, surrounded by connective tissue.
Cranial Nerves
---Twelve pairs of cranial nerves emerge from the inferior surface of the brain.
Spinal Nerves
---Thirty-one pairs of spinal nerves emerge laterally from the spinal cord.
Autonomic Nervous System
---The autonomic nervous system is a visceral efferent system, which means it sends motor impulses to the visceral organs.
Answers & Comments
Answer:
CENTRAL NERVOUS SYSTEM
-The spinal cord is connected to a section of the brain called the brainstem and runs through the spinal canal.
-Cranial nerves exit the brainstem.
Nerve roots exit the spinal cord to both sides of the body.
-The spinal cord carries signals (messages) back and forth between the brain and the peripheral nerves.
-Cerebrospinal fluid surrounds the brain and the spinal cord and also circulates within the cavities (called ventricles) of the central nervous system.
-The leptomeninges surround the brain and the spinal cord.
-The cerebrospinal fluid circulates between 2 meningeal layers called the
pia matter and the arachnoid(or pia-arachnoid membranes).
PERIPHERAL NERVOUS SYSTEM
Structure of a Nerve
---A nerve contains bundles of nerve fibers, either axons or dendrites, surrounded by connective tissue.
Cranial Nerves
---Twelve pairs of cranial nerves emerge from the inferior surface of the brain.
Spinal Nerves
---Thirty-one pairs of spinal nerves emerge laterally from the spinal cord.
Autonomic Nervous System
---The autonomic nervous system is a visceral efferent system, which means it sends motor impulses to the visceral organs.