Overview of the Nervous System Notes

Brain

Spinal Cord

Neurons

Heart

They detect changes inside or outside the body and relay signals to the CNS.

They coordinate and blend sensory signals in the brain.

They respond to incoming signals by effecting change in tissues.

They integrate signals within the CNS by relaying them.

Integrate sensory signals by relaying signals within the CNS

Detect changes inside or outside the body

Respond to incoming signals by effecting change in tissues

Produce unconscious or conscious records

Cranial nerves

Spinal nerves

Thalamus

Hypothalamus

Somatic Nervous System

Sympathetic Nervous System

Parasympathetic Nervous System

Central Nervous System

Neuron

Astrocyte

Microglia

Oligodendrocyte

Astrocytes

Microglia

Oligodendrocytes

Neurons

Microglia

Oligodendrocytes

Ependymal cells

Schwann cells

Act as neuronal stem cells

Transmit nerve signals

Form myelin sheath

Integrate signals

They myelinate a single axon

They are found in the CNS

They form myelin sheaths

They support axons

Brain, Spinal Cord, Neurons

Heart, Lungs, Kidneys

Bones, Muscles, Skin

Liver, Pancreas, Stomach