BC: You've got a lot of showing your face around here again! | -------------COWBOYS :O ------------
FC: Nervous System | ------ :o brain | By:Carter Lowden
1: The Brain is the center of all the nervous well with out it being in the center. | Brain | The brain is the most complex part of the body holding up to 33 billion neurons and 1 billion synapses. | The brain controls the other organ systems of the body, either by activating muscles or by causing secretion of chemicals such as hormones and neurotransmitters. | -------------------Brain :O
2: Spinal Cord | ----------------------- SPINAL CORD :O | The spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the brain. | The brain and spinal cord together make up the central nervous system. | It is around 18 in in men and around 17 in long in women. | The spinal cord has three major functions: A. Serve as a conduit for motor information, which travels down the spinal cord. B. Serve as a conduit for sensory information, which travels up the spinal cord. C. Serve as a center for coordinating certain reflexes.
3: Nerve Cell(Neuron) | ----------------------Neuron :O | A neuron (also known as a neurone or nerve cell) is an electrically excitable cell that processes and transmits information by electrical and chemical signaling. | Neurons connect to each other using dendrites to form networks. | Neurons are the core components of the nervous system, which includes the brain, spinal cord, and peripheral ganglia. | Motor neurons receive signals from the brain and spinal cord and cause muscle contractions and affect glands.
4: Medulla Oblongata | The medulla oblongata is the lower half of the brainstem. | Besides forming the major pathway for nerve impulses entering and leaving the skull, the medulla oblongata regulates the reflex responses that control breathing, heart beat, blood pressure, and other essential involuntary functions. | The anterior surface of the medulla oblongata is related to the basilar portion of the occipital bone, and its posterior part is sunk into the lower part of the anterior notch of the cerebellum.
5: Cerebrum | _________________________________________ | Cerebellum | The cerebrum comprises what most people think of as the "brain." It lies in front or on top of the brainstem and in humans is the largest and most well-developed of the five major divisions of the brain. The cerebrum is the newest structure in the phylogenetic sense, with mammals having the largest and most well-developed among all species. | The cerebellum (Latin for little brain) is a region of the brain that plays an important role in motor control. It is also involved in some cognitive functions such as attention and language, and probably in some emotional functions such as regulating fear and pleasure responses.
6: How it works... | The nervous system is an organ system containing a network of specialized cells called neurons that coordinate the actions of an animal and transmit signals between different parts of its body. In most animals the nervous system consists of two parts, central and peripheral. The central nervous system of vertebrates (such as humans) contains the brain, spinal cord, and retina. | The peripheral nervous system consists of sensory neurons, clusters of neurons called ganglia, and nerves connecting them to each other and to the central nervous system. These regions are all interconnected by means of complex neural pathways.
7: The enteric nervous system, a subsystem of the peripheral nervous system, has the capacity, even when severed from the rest of the nervous system through its primary connection by the vagus nerve, to function independently in controlling the gastrointestinal system. | Neurons send signals to other cells as electrochemical waves travelling along thin fibers called axons, which cause chemicals called neurotransmitters to be released at junctions called synapses.
8: What can effect it... | If you were to say slip and fall and happen some how to hit your spinal cord you would be forever paralyzed from the injured spot down. | This happens because the spinal cord is like a messenger the message may reach the first person but may not the next if he dies, as like the spinal cord if it gets damaged.
9: Damage to the nervous system may be due to a tumour, aneurysm of aorta, or trauma causing localised problems depending on the area and type of damage. | Some conditions affect the central nervous system (the brain and spinal cord), and some the peripheral nervous system, which transmits information to and from all other parts of the body. Damage to the cranial nerves can affect the sense of smell, visual focus and eye movement, facial expressions, tongue movement and certain aspects of respiration, any of which can cause difficulties in course-related activities.