Nervous System
The Nervous System has several parts within
it that are instrumental to its success. However it also serves several functions. These functions are a sensory function, an interpretive function and a motor function. Sensory nerves gather information from inside the body and the outside environment. The nerves then carry the information to central nervous system where it is proccessed and interpreted by the Central Nervous System. (Intrepretive Function). The final function is motor nerves conveying the information to the muscles and the glands of the body causing them to react. These are the functions and how the Nervous System accomplishes its functions. However, the parts inside it that are key are the brain, medulla, cerebral cortex, and the cerebellum. The brain is key as it has several cell proccess and these help the nervous system process its functions. The brain is also divided into several parts which are the cerebrum, medulla, cerebral cortex and the cerebellum.
It also has several structures that define it. These structures are the CNS consisting of the brain and spinal cord. These are protected by bone and cushioned by the cerebrospinal fluid helping protect it from injury. The second structure is the perephrial system which connects the CNS to the rest of the body.
Cerebrum - controls the movement of the body and areas of speech, hearing, smell, sight, memory, learning and motor and sensory areas .
Cerebral cortex - regulates learning, reasoning, language, and memory
Cerebellum - manages voluntary muscles, balance and muscle tone
Brain stem - controls heart rate, breathing, swallowing, coughing, and vomiting
Nerve Impulse Travel
Nerve impulses have a unique way of travel. They are carried by neurons and are made up of the cell body, axon and several dendrites. Signals then move across the synapse which is the place where the axon of one neuron meet the dendrite and from here they meet as the result of a chemical called neurotransmitters and thus perform their action.
Reflex Arc
A reflex arc is a neural pathway that controls an action reflex. In higher animals, most sensory neurons do not pass directly into the brain, but in the spinal cord. This property allows reflex actions to occur relatively quickly by activating spinal motor neurons without the delay of signals through the brain, although the brain will receive sensory input while the reflex action occurs.
PNS. What is it?
The Perephial Nervous System consists of the nerves and ganglia.
There are 2 main branches of the peripherial nervous system, the autonomic system and the somatic system. Autonomic controls our organs, while the somatic regulate sketetal muscle movements. Both of these help with the survivak of the human body.
Our third stop will be the Nervous System. In this short tour we will be passing the Central Nervous System and the Periphal System which connects the nervous system to the rest of the body. Both of these systems contain various parts within them. There will be 2 options to this system, the central nervous system and the peripheral system. For the trip to the central system we will explore the brain and spinal cord. In the brain we’ll learn stop at multiple unique control centers that each play an important role.