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The human nervous system is a complex network that includes the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS, composed of the brain and spinal cord, processes information and initiates responses. The PNS connects the CNS to the body, handling both voluntary and involuntary actions through the somatic and autonomic systems. Understanding these systems is crucial for comprehending how the body functions and adapts.
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The brain is the control center for processing information and directing responses
Conduit for neural signals
The spinal cord acts as a conduit for neural signals between the brain and the body
Coordination of reflexes
The spinal cord coordinates reflexes independently of the brain, ensuring rapid responses to certain stimuli
The CNS is safeguarded by the blood-brain barrier and cerebrospinal fluid, which protect against pathogens and injury
The somatic nervous system governs voluntary muscle movements and transmits sensory information to the CNS
Sympathetic Nervous System
The sympathetic nervous system mobilizes the body's resources during stress or threat, known as the fight-or-flight response
Parasympathetic Nervous System
The parasympathetic nervous system conserves energy and facilitates restorative processes, often referred to as the rest-and-digest response
The PNS plays a critical role in the body's ability to interact with and adapt to its environment
The CNS processes information and dictates overall function, while the PNS implements these directives at the local level
The somatic nervous system enables voluntary movements and sensory input, while the autonomic nervous system autonomously regulates vital involuntary processes
The sympathetic and parasympathetic systems within the ANS fine-tune the body's responses to stress and relaxation, respectively
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The ______ ______ system connects the central nervous system to limbs and organs, facilitating signal transmission.
peripheral nervous
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Components of CNS
Brain and spinal cord.
02
Function of cerebrospinal fluid
Protects CNS from injury, provides cushioning.
