Nervous System
by Dalton Neelon
1. Autonomic Nervous System- controls involuntary responses (breathing, sweating, etc.), and plays a major role in emotions.
1.1. Spinal Nerves- it carries motor, sensory, and autonomic signals between the spinal cord and the body. There are 31 pairs of spinal nerves.
2. Somatic Nervous System- oversees voluntary actions and monitors data about external environment.
2.1. Cranial Nerves- the nerves of the brain, which emerge from or enter the skull. There are twelve of them.
3. Motor Division- begins in the Central Nervous System and sends impulses to muscles, glands, and organs.
3.1. Motor Neurons- the impulses that are being sent.
4. Sensory Division- conducts signals in various parts of the body to the Central Nervous System.
4.1. Sensory Neurons- the signals that are being sent.
5. Peripheral Nervous System- the nervous system outside the brain and spinal cord.
6. Spinal Cord- is the cord of nervous tissue that extends from the brain along the back. Acts like a highway.
7. Brain- is an organ of nervous tissue contained in the skull of. It functions as the coordinating center of sensation and intellectual and nervous activity. It is the command center.
7.1. Cerebrum- it is the largest part of the brain, consisting of two lobes. The cerebrum controls thought and voluntary movement.
7.2. Brainstem- it connects cerebrum with the spinal cord. Directs activities essential for life; controls involuntary actions.
7.3. Cerebellum- the part of the brain at the back of the skull. Its function is to coordinate and regulate muscular activity.
8. Central Nervous System- the central nervous system is made up of the brain and spinal cord. It controls thought processes, guides movement, and registers sensations throughout the body.
