Nervous System ActivityOnline version University of West Georgia functional Anatomy by Zaynah Elliott 1 Neurons 2 Autonomic Nervous System 3 Somatic Nervous System 4 Enteric Nervous System 5 Brain 6 Central nervous system (CNS) 7 Spinal cord 8 Peripheral nervous system (PNS) 9 Sympathetic system 10 Parasympathetic system basic components of the nervous system the functional units of nervous tissue part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes. Involuntary Smooth muscle, cardiac muscle, and glands responses are voluntary receptors Head, body surfaces, limbs, and special sense organs Skeletal muscle brain of the gut responses are involuntary and include peristalsis (waves of smooth muscle contraction, which propels food through the GI tract) and glandular secretions. control center of the nervous system can be divided into four main parts: the brainstem, cerebellum, diencephalon, and cerebrum. occupies cranial cavity responsible for storing sensory information, creating thoughts, emotions, and memories. is the processing and control center of the nervous system, analyzing and consolidating incoming sensory information and triggering motor responses. consists of 31 segments corresponding to the 31 pairs of spinal nerves. continuous with the medulla oblongata as it exits the skull through the foramen magnum, and descends into the vertebral cana div ided into the somatic nervous system (SNS), autonomic nervous system (ANS), and enteric nervous system (ENS). It detects changes in the internal and external environment through sensory receptors located throughout the body. controls our 'fight or flight' responses quickly activates our body preparing it for action by increasing the heart rate, dilating the pupils and the blood vessels to the muscles, increasing skin sweating, and suppressing digestion. controls the opposite responses to 'fight or flight' responses 'rest and digest' responses it depresses the activ ity of the body preparing it for rest by decreasing the heart rate, constricting the pupils and the vessels to the skeletal muscles, and stimulating digestion
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