The Nervous System & Endocrine Systems

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The Nervous System & Endocrine Systems

Nervous System

Peripheral Nervous System The sensory and motor neurons that connect the central nervous system (CNS) to the rest of the body.

Central Nervous System The brain and spinal cord.

Autonomic Nervous System The part of the peripheral nervous system that controls the glands and the muscles of the internal organs (such as the heart). Its sympathetic division arouses; its parasympathetic division calms.

Somatic Nervous System The division of the peripheral nervous system that controls the body’s skeletal muscles. Also called the skeletal nervous system.

Sympathetic Nervous System The division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations.

Parasympathetic Nervous System The division of the autonomic nervous system that calms the body, conserving its energy.

Reflex A simple, autonomic response to a sensory stimulus such as the knee-jerk response.

Endocrine System